3D Sneaky Puzzles® - Singin' Sea Creatures™ is a 46-piece puzzle that is full of surprises. This 3D floor puzzle from Patch Products is a perfect gift for young children. After you put together the colorful sea scene, slip on the 3D glasses for a magical experience. It looks like the fish are swimming toward you. Look carefully and find all the letters of the alphabet and numbers 0-9 hidden in the picture. Singin Sea Creatures 3D Puzzle is a great educational tool, too.