You can stack this colorful, educational stacking tower with 5 differently sized cubes on top of each other or place them side by side as a puzzle. Try to assemble the hidden puzzle by placing the blocks with the correct sides next to each other. The 5 sides are decorated with spaceships, aliens, animals, and numbers to teach children stacking, puzzling, counting, and recognizing objects. The largest stacking block is shaped like a playhouse for the included wooden figures.