If you've ever gotten your pant leg caught in a bicycle chain, the Tangled Bicycle Puzzle will get your wheels turning. Luckily, life's little problems seem to melt away when you solve a disentanglement puzzle like this one. The objects start knotted together, a jumble of metal and string. There's only one way to untangle the puzzle and separate the pieces. Sure, finding the solution might take awhile but once you taste sweet freedom, you'll feel like anything is possible if you set your mind to it. Measures about 6"x5". Designed by Jean Claude Constantin.