Think you can separate these clever metal links, and then put them back together? Think again! Made from heavy, chromed steel and bent into brain-twisting shapes, these Puzzle Club puzzles for ages 8 and up are downright fiendish. Each is presented in a colorful gift box with a different cartoon genius offering a bit of encouragement. (Not recommended for children under 3.)

Professor Sense Sizzler declares that his Enigma Puzzle is the most difficult in the Puzzle Club range to put back together (that is, if you can get it apart in the first place). He promises that only the brightest of brains will master this challenge.