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. Brilliant Basics Stack and Roll Cups include 10 colorful cups with grooved surfaces for a snug fit and easy stacking. Baby will love nesting the colorful numbered cups together, stacking them higher and higher, or snapping them together to make colorful balls to roll. A smiling jingle ball nests inside any cup or fits on top of a whole stack. Stacking, nesting or snapping cups together introduces baby to size, shape and how things fit together in a really fun way. Different colors, sizes and numbers help build early identification skills. Set of plastic cups is recommended for children ages 6 to 36 months.