![Amazon.com: 3 Pieces Brain Teaser Metal Puzzle Toy, Handheld 3D Unlock Interlocking Puzzle, Metal Knot Puzzle Mind Games for Adults Teens Educational Toy Gift (Classic Style) : Toys & Games Amazon.com: 3 Pieces Brain Teaser Metal Puzzle Toy, Handheld 3D Unlock Interlocking Puzzle, Metal Knot Puzzle Mind Games for Adults Teens Educational Toy Gift (Classic Style) : Toys & Games](https://m.media-amazon.com/images/I/71MtOmf9TKL._AC_SX425_.jpg)
Amazon.com: 3 Pieces Brain Teaser Metal Puzzle Toy, Handheld 3D Unlock Interlocking Puzzle, Metal Knot Puzzle Mind Games for Adults Teens Educational Toy Gift (Classic Style) : Toys & Games
![Hard Logic Puzzles & Brain Games for Adults: 500 Puzzles & 12 Puzzle Types (Sudoku, Fillomino, Battleships, Calcudoku, Binary Puzzle, Slitherlink, ... (Challenging Fun Brain Teasers Series): Alzamili, Dr. Khalid: 9789922636092: Amazon.com: Books Hard Logic Puzzles & Brain Games for Adults: 500 Puzzles & 12 Puzzle Types (Sudoku, Fillomino, Battleships, Calcudoku, Binary Puzzle, Slitherlink, ... (Challenging Fun Brain Teasers Series): Alzamili, Dr. Khalid: 9789922636092: Amazon.com: Books](https://images-na.ssl-images-amazon.com/images/I/51U5zfu7PxL._SX384_BO1,204,203,200_.jpg)
Hard Logic Puzzles & Brain Games for Adults: 500 Puzzles & 12 Puzzle Types (Sudoku, Fillomino, Battleships, Calcudoku, Binary Puzzle, Slitherlink, ... (Challenging Fun Brain Teasers Series): Alzamili, Dr. Khalid: 9789922636092: Amazon.com: Books
![Amazon.com: 3 Pieces Brain Teaser Puzzles,Metal Cast Puzzle Game Toys,3D Highly Difficult Adult Puzzles,IQ Educational Box for Kids and Teens : Toys & Games Amazon.com: 3 Pieces Brain Teaser Puzzles,Metal Cast Puzzle Game Toys,3D Highly Difficult Adult Puzzles,IQ Educational Box for Kids and Teens : Toys & Games](https://m.media-amazon.com/images/I/61r-fJ4in8L._AC_SX425_.jpg)
Amazon.com: 3 Pieces Brain Teaser Puzzles,Metal Cast Puzzle Game Toys,3D Highly Difficult Adult Puzzles,IQ Educational Box for Kids and Teens : Toys & Games
![Amazon.com: 30 Unique Metal Puzzle Toys, IQ Tester, Brain Teasers for Adults and Children, Instructions Included, Fun Fidget Puzzles, Train Your Brain, Travel Bag Included : Toys & Games Amazon.com: 30 Unique Metal Puzzle Toys, IQ Tester, Brain Teasers for Adults and Children, Instructions Included, Fun Fidget Puzzles, Train Your Brain, Travel Bag Included : Toys & Games](https://m.media-amazon.com/images/I/710KlLIvEVL._AC_SX425_.jpg)
Amazon.com: 30 Unique Metal Puzzle Toys, IQ Tester, Brain Teasers for Adults and Children, Instructions Included, Fun Fidget Puzzles, Train Your Brain, Travel Bag Included : Toys & Games
![Amazon.com: EJOYFL Brain Teaser Puzzle Unlock Interlock Puzzle IQ Test Toy 3D Wooden and Metal Magic Ball Brain Teaser Toy Puzzles for Teen and Adults (28Pcs) : Toys & Games Amazon.com: EJOYFL Brain Teaser Puzzle Unlock Interlock Puzzle IQ Test Toy 3D Wooden and Metal Magic Ball Brain Teaser Toy Puzzles for Teen and Adults (28Pcs) : Toys & Games](https://m.media-amazon.com/images/I/71iUpEBm-BL._AC_SX425_.jpg)
Amazon.com: EJOYFL Brain Teaser Puzzle Unlock Interlock Puzzle IQ Test Toy 3D Wooden and Metal Magic Ball Brain Teaser Toy Puzzles for Teen and Adults (28Pcs) : Toys & Games
![Amazon.com: LOOBANI Assorted Brain Teasers Metal Wire IQ Puzzles with Plastic Box Package Great Educational Intelligence Toys for Adult Children and Student Expanding Mind 1 Set 30Pcs : Toys & Games Amazon.com: LOOBANI Assorted Brain Teasers Metal Wire IQ Puzzles with Plastic Box Package Great Educational Intelligence Toys for Adult Children and Student Expanding Mind 1 Set 30Pcs : Toys & Games](https://m.media-amazon.com/images/I/71A0HTTNxvL._AC_SX425_.jpg)
Amazon.com: LOOBANI Assorted Brain Teasers Metal Wire IQ Puzzles with Plastic Box Package Great Educational Intelligence Toys for Adult Children and Student Expanding Mind 1 Set 30Pcs : Toys & Games
![Brainteasers For Adults 1: Mixed Style Logic & Math Brain Games With Various Levels Of Difficulty: Includes: Minesweeper, Kakuro, Roundabouts, Slitherlink, Fillomino, Gokigen: Books, Pats Puzzle: 9781981084159: Amazon.com: Books Brainteasers For Adults 1: Mixed Style Logic & Math Brain Games With Various Levels Of Difficulty: Includes: Minesweeper, Kakuro, Roundabouts, Slitherlink, Fillomino, Gokigen: Books, Pats Puzzle: 9781981084159: Amazon.com: Books](https://images-na.ssl-images-amazon.com/images/I/51dTkQC9z0L._SX331_BO1,204,203,200_.jpg)
Brainteasers For Adults 1: Mixed Style Logic & Math Brain Games With Various Levels Of Difficulty: Includes: Minesweeper, Kakuro, Roundabouts, Slitherlink, Fillomino, Gokigen: Books, Pats Puzzle: 9781981084159: Amazon.com: Books
![Riddles: Stimulating Brain Teasers, Challenging Riddles, Puzzles for Kids and Adults, Mental Training, Fun Activities for Mind Growth - Kindle edition by Sinclair, Avery. Humor & Entertainment Kindle eBooks @ Amazon .com. Riddles: Stimulating Brain Teasers, Challenging Riddles, Puzzles for Kids and Adults, Mental Training, Fun Activities for Mind Growth - Kindle edition by Sinclair, Avery. Humor & Entertainment Kindle eBooks @ Amazon .com.](https://m.media-amazon.com/images/I/51Nd4PliM3L._SX260_.jpg)
Riddles: Stimulating Brain Teasers, Challenging Riddles, Puzzles for Kids and Adults, Mental Training, Fun Activities for Mind Growth - Kindle edition by Sinclair, Avery. Humor & Entertainment Kindle eBooks @ Amazon .com.
![Amazon.com: Brain Teaser Toys, 6 Puzzles IQ Test Metal and Wooden Unlock Interlock Disentanglement Puzzles Game for Kids, Boys and Girls : Toys & Games Amazon.com: Brain Teaser Toys, 6 Puzzles IQ Test Metal and Wooden Unlock Interlock Disentanglement Puzzles Game for Kids, Boys and Girls : Toys & Games](https://m.media-amazon.com/images/I/61eaKTxFGvL._AC_SX425_.jpg)
Amazon.com: Brain Teaser Toys, 6 Puzzles IQ Test Metal and Wooden Unlock Interlock Disentanglement Puzzles Game for Kids, Boys and Girls : Toys & Games
![Amazon.com: Coogam Metal Wire Puzzle Set of 16 with Pouch,Brain Teaser IQ Test Disentanglemen Iron Link Unlock Interlock Game Chinese Ring Magic Trick Toy for Party Favor Kids Adults Challenge : Toys Amazon.com: Coogam Metal Wire Puzzle Set of 16 with Pouch,Brain Teaser IQ Test Disentanglemen Iron Link Unlock Interlock Game Chinese Ring Magic Trick Toy for Party Favor Kids Adults Challenge : Toys](https://m.media-amazon.com/images/I/717zuPApnuL._AC_SX425_.jpg)
Amazon.com: Coogam Metal Wire Puzzle Set of 16 with Pouch,Brain Teaser IQ Test Disentanglemen Iron Link Unlock Interlock Game Chinese Ring Magic Trick Toy for Party Favor Kids Adults Challenge : Toys
![Amazon.com: Meao 30 Pieces Thicker Metal Wire Brain Teaser with Pouch - Assembly & Disentanglement Puzzles Toys - Magic Trick Toys Puzzles Set - Ideal Gifts Kids Adults - Intermediate Difficulty : Toys & Games Amazon.com: Meao 30 Pieces Thicker Metal Wire Brain Teaser with Pouch - Assembly & Disentanglement Puzzles Toys - Magic Trick Toys Puzzles Set - Ideal Gifts Kids Adults - Intermediate Difficulty : Toys & Games](https://m.media-amazon.com/images/I/71Z208pa89L._AC_SX425_.jpg)
Amazon.com: Meao 30 Pieces Thicker Metal Wire Brain Teaser with Pouch - Assembly & Disentanglement Puzzles Toys - Magic Trick Toys Puzzles Set - Ideal Gifts Kids Adults - Intermediate Difficulty : Toys & Games
![Educational Insights BrainBolt Brain Teaser Memory Game, Gift for Kids, Teens & Adults, Brain Game, Ages 7 to 107 : Everything Else Educational Insights BrainBolt Brain Teaser Memory Game, Gift for Kids, Teens & Adults, Brain Game, Ages 7 to 107 : Everything Else](https://m.media-amazon.com/images/I/91YM5lFEqnL._AC_SX425_.jpg)
Educational Insights BrainBolt Brain Teaser Memory Game, Gift for Kids, Teens & Adults, Brain Game, Ages 7 to 107 : Everything Else
![30 Interactive Brainteasers to Warm up your Brain (Riddles & Brain teasers, puzzles, puzzles & games) - Kindle edition by Puzzleland. Humor & Entertainment Kindle eBooks @ Amazon.com. 30 Interactive Brainteasers to Warm up your Brain (Riddles & Brain teasers, puzzles, puzzles & games) - Kindle edition by Puzzleland. Humor & Entertainment Kindle eBooks @ Amazon.com.](https://m.media-amazon.com/images/I/51Aw5BBa8oL.jpg)
30 Interactive Brainteasers to Warm up your Brain (Riddles & Brain teasers, puzzles, puzzles & games) - Kindle edition by Puzzleland. Humor & Entertainment Kindle eBooks @ Amazon.com.
![The Ultimate Book of Riddles and Brain Teasers For Adults and Kids: 222 Easy to Hard Riddles and Brain Teasers - Kindle edition by Brooker, A.C.. Humor & Entertainment Kindle eBooks @ Amazon.com. The Ultimate Book of Riddles and Brain Teasers For Adults and Kids: 222 Easy to Hard Riddles and Brain Teasers - Kindle edition by Brooker, A.C.. Humor & Entertainment Kindle eBooks @ Amazon.com.](https://m.media-amazon.com/images/I/51dsjnTrISL.jpg)
The Ultimate Book of Riddles and Brain Teasers For Adults and Kids: 222 Easy to Hard Riddles and Brain Teasers - Kindle edition by Brooker, A.C.. Humor & Entertainment Kindle eBooks @ Amazon.com.
![Amazon.com: Fun Games for Adults 3D Wooden Puzzle Brain Teasers and Educational Games in Set of 9 Wooden Puzzles to Challenging Puzzles for Adults and Brain Games for Kids Suit for Living Amazon.com: Fun Games for Adults 3D Wooden Puzzle Brain Teasers and Educational Games in Set of 9 Wooden Puzzles to Challenging Puzzles for Adults and Brain Games for Kids Suit for Living](https://m.media-amazon.com/images/I/91qGvWMclqL._AC_SX425_.jpg)
Amazon.com: Fun Games for Adults 3D Wooden Puzzle Brain Teasers and Educational Games in Set of 9 Wooden Puzzles to Challenging Puzzles for Adults and Brain Games for Kids Suit for Living
![Amazon.com: Bamboo 3D Puzzle Metal Brain Teasers Puzzles Mind Game Toys Set for Teens and Adults Pack of 12pcs : Toys & Games Amazon.com: Bamboo 3D Puzzle Metal Brain Teasers Puzzles Mind Game Toys Set for Teens and Adults Pack of 12pcs : Toys & Games](https://m.media-amazon.com/images/I/61DfCpdKrdL._AC_SX425_.jpg)
Amazon.com: Bamboo 3D Puzzle Metal Brain Teasers Puzzles Mind Game Toys Set for Teens and Adults Pack of 12pcs : Toys & Games
![The Great Book of Riddles: 250 Magnificent Riddles, Puzzles and Brain Teasers (The Great Books Series 1) - Kindle edition by Keyne, Peter. Humor & Entertainment Kindle eBooks @ Amazon.com. The Great Book of Riddles: 250 Magnificent Riddles, Puzzles and Brain Teasers (The Great Books Series 1) - Kindle edition by Keyne, Peter. Humor & Entertainment Kindle eBooks @ Amazon.com.](https://m.media-amazon.com/images/I/51bxig08hvL.jpg)
The Great Book of Riddles: 250 Magnificent Riddles, Puzzles and Brain Teasers (The Great Books Series 1) - Kindle edition by Keyne, Peter. Humor & Entertainment Kindle eBooks @ Amazon.com.
![Adult Brain Teaser: Large Prints Sudoku Puzzles For Adults: Laughlin, Tyson, Zone, Strictly Fun: 9781690490067: Amazon.com: Books Adult Brain Teaser: Large Prints Sudoku Puzzles For Adults: Laughlin, Tyson, Zone, Strictly Fun: 9781690490067: Amazon.com: Books](https://images-na.ssl-images-amazon.com/images/I/419v+Syp9jL._SX367_BO1,204,203,200_.jpg)
Adult Brain Teaser: Large Prints Sudoku Puzzles For Adults: Laughlin, Tyson, Zone, Strictly Fun: 9781690490067: Amazon.com: Books
![Amazon.com: Brain Teasers For Adults: Triplets Puzzles - 100 Large Puzzles For Adults (Brain Teaser Puzzles): 9781983207198: Andrews, Deborah: Books Amazon.com: Brain Teasers For Adults: Triplets Puzzles - 100 Large Puzzles For Adults (Brain Teaser Puzzles): 9781983207198: Andrews, Deborah: Books](https://images-na.ssl-images-amazon.com/images/I/41r2LVXVDTL._SX331_BO1,204,203,200_.jpg)
Amazon.com: Brain Teasers For Adults: Triplets Puzzles - 100 Large Puzzles For Adults (Brain Teaser Puzzles): 9781983207198: Andrews, Deborah: Books
![Amazon.com: 32 Brain Teasers Metal Wire IQ Puzzles,for Adult Children and Student Expanding Mind, Disentanglement Puzzle Unlock Interlock Toys : Toys & Games Amazon.com: 32 Brain Teasers Metal Wire IQ Puzzles,for Adult Children and Student Expanding Mind, Disentanglement Puzzle Unlock Interlock Toys : Toys & Games](https://m.media-amazon.com/images/I/61rEg8PeSSL._AC_SX425_.jpg)
Amazon.com: 32 Brain Teasers Metal Wire IQ Puzzles,for Adult Children and Student Expanding Mind, Disentanglement Puzzle Unlock Interlock Toys : Toys & Games
![Amazon.com: Super Tricky Brain Teasers: 120 Challenging Riddles, Math Puzzles, and Logic Games: 9781638074830: Malena-Webber, Richard: Books Amazon.com: Super Tricky Brain Teasers: 120 Challenging Riddles, Math Puzzles, and Logic Games: 9781638074830: Malena-Webber, Richard: Books](https://images-na.ssl-images-amazon.com/images/I/51U+xYedM6L._SX331_BO1,204,203,200_.jpg)
Amazon.com: Super Tricky Brain Teasers: 120 Challenging Riddles, Math Puzzles, and Logic Games: 9781638074830: Malena-Webber, Richard: Books
![Brain Teasers for Adults: 75 Large Print Puzzles, Riddles, and Games to Keep You on Your Toes: Danesi, Marcel: 9781646110582: Books: Amazon.com Brain Teasers for Adults: 75 Large Print Puzzles, Riddles, and Games to Keep You on Your Toes: Danesi, Marcel: 9781646110582: Books: Amazon.com](https://m.media-amazon.com/images/I/51MlwAdTMaL._AC_SY780_.jpg)
Brain Teasers for Adults: 75 Large Print Puzzles, Riddles, and Games to Keep You on Your Toes: Danesi, Marcel: 9781646110582: Books: Amazon.com
![Zooshine 18 Sets Metal Brain Puzzles Teasers IQ Toys,Metal Puzzles Games for Adults Kids : Toys & Games Zooshine 18 Sets Metal Brain Puzzles Teasers IQ Toys,Metal Puzzles Games for Adults Kids : Toys & Games](https://m.media-amazon.com/images/I/610H1Id3sPL._AC_SL1020_.jpg)