Toy Cubby Toddler Toy Stacking Alphabets and Numbers Building Cups Set 1 set Toddler Toy Stacking Alphabets and Numbers Building Cups. Made from durable materials, comes in assorted vibrant colors that can attracts toddlers. Stacking cups has numbers and letters printed around each cup from 1 to 10 and A to H. Helps toddlers get familiarize with series of numbers and letters by stacking the cups in orderly pattern developing identification skills. Easy to attach to and safe to play for kids.