Multiple Ways to Play! Bonus Link For 6+ Months 8 Brightly Colored Cups Stack Together 2 Large Numbers Embossed on Bottom of Cups to Practice Counting Number Recognition Classic toys like nesting cups are all-time favorites because they offer all kinds of fun. Children love to fit them together, to stack them up to build a pyramid, to put things in then take them out, to turn them over and hide things underneath. Cups have large numbers embossed on the base so an older child can practice counting and begin building number recognition skills. Dishwasher-safe. Conforms to ASTM Specification on Toy Safety F963.