Baby can learn so much through basic play, and these stackable, nestable, fit-together-and-roll-around cups offer endless versatility for lots of enriching discoveries. Includes 10 colorful cups to grasp, stack or nest, with grooved surfaces for a snug fit and easy stacking. Different colors, sizes and numbers help build early identification skills. A smiling jingle ball nests inside any cup, or fits on top of a whole stack!