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.)

This is one of the most popular puzzles in the entire Puzzle Club range, assures its inventor, Professor Egg Head. It's easy to put together, but so tricky to take apart again that the difficulty rating is "Extreme."