Think Fun A-ha! Square Fit Brainteasers
a-ha! Rec-Tangle
Think Fun Shape By Shape
Think Fun Square by Square
ThinkFun Adams Cube
Think Fun Fidgitz Twisty Brainteaser Puzzle - Perfect for Silent Fidgeting, Combines a Fidget Toy with a Puzzle
ThinkFun Block By Block
ENIGMA Hanayama Cast Metal Brain Teaser Puzzle (Level 6)
ThinkFun Zig Zag Knot
Back-Spin Handheld Puzzle Game
Fat Brain Toys Coggy Brainteasers for Ages 6 to 12
MONKEY POD GAMES Domino Cube
Fat Brain Toys Ivan's Hinge Brainteasers for Ages 8 to 12