bObles Duckling comes in two sizes that each inspires movement and new ways to play. THis is the large version. The child can rock through the big waves of the ocean, balance on the back of the Duckling and surf, or lie on the tummy and rock. Both balance and coordination ability are stimulated. Duckling loves to be tumbled with, and if you have more than one, they can be stacked to different seating heights!