Challenge yourself with this colorful classic. MasterPieces Rainbow Gradient Puzzle is a gradient of all the colors the naked eye can see. It starts with light colors and gradually graduates to dark colors, spanning the whole spectrum of the rainbow. This puzzle will test your skills and keep you entertained for hours. It's made with 100% recycled chipboard and Soy-based ink, so you can feel good about your purchase. This puzzle is sure to entertain.