Lezhi IQ Toys-AB A+B Test Mind Game Brain Teaser Wire Magic Trick Toy IQ Puzzle Set (Pack of 16), Metallic

Artncraft 3-in-One Wooden Puzzle Games Set - 3D Puzzles for Teens and Adults - Includes Wood Interlocking Blocks, Diagonal Burr, and Snake Cube in Storage Box

Solid Wood Brain Teasers - 7 Different Brain Busters

True Genius CURATED Collection - disassembly Puzzle, Brain teasers, Adult Puzzle

Difficult Riddles For Smart Kids: 300 Difficult Riddles And Brain Teasers Families Will Love (Books for Smart Kids)

Educational Insights Kanoodle Extreme | Brain Twisting 2-D & 3-D Puzzle Game for Kids, Teens & Adults | Featuring over 300 Challenges

Infinity Cube Fidget Toy, Sensory Tool EDC Fidgeting Game for Kids and Adults, Cool Mini Gadget Best for Stress and Anxiety Relief and Kill Time, Unique Idea that is Light on the Fingers and Hands

Bepuzzled ENIGMA Hanayama Cast Metal Brain Teaser Puzzle (Level 6) Puzzles For Kids and Adults Ages 12 and Up

Metal Brain Teaser Puzzles 6 Set for Kids and Adults, Large Mind Game Handheld Disentanglement Toys, 3D Coil Cast IQ Logic with Plastic Storage Box and Solutions, Best Novelty Idea

Bits and Pieces - EZ Atom Metal Puzzle - Marble in The Center Puzzle - Brainteaser Puzzle - Measures 3-1/4" x 3-1/4" x 3-1/4"

Bepuzzled QUARTET Hanayama Cast Metal Brain Teaser Puzzle (Level 6) Puzzles For Kids and Adults Ages 12 and Up