These 12 stackable & nestable cups are uniquely designed to deliver a surprising load of creative and pre-math benefits. Cups are volumetrically correct & sequentially sized for interaction. Volumes can be added or subtracted. For example, Cup #1 + Cup #3 = Cup #4. Fill & dump, stack & nest, match & sort, mold & stamp, and more. Activity guide introduces a host of fundamental concepts related to counting, sorting, volume, size, patterns, measurement, clock time & more. Numbers printed on front in 3 formats & matching raised numbers molded on inside. Sequentially sized animals molded on bottom of cups for dough play. Colors may vary. dt exclusive. Multiple awards. 12 months+ Early Learning: Stack & Topple Large & Small Fill & Dump Color Sorting Preschool Learning: Numbers & Counting Sequencing & Pattern Trilingual Numbers Animal Sizes Clay Stamping School Learning: Addition & Subtraction Volume & Weight Pour & Measure Compare & Predict Clock Face Positions