For when you've outgrown your child's puzzles and need something a bit more... sophisticated.
Why do you always lose one sock in the wash? Uncover the secrets of the vanishing sock.
Learn MoreGet stuck in a time loop and try to figure out why the clock won't stop spinning.
Take the LoopUnravel the mystery of the impossible toy that's been vexing you since 1978.
Unscramble the Cube