As your toddler practices sequencing the 5 colorful cups for nesting or stacking activities, they engage in cognitive thinking, and problem-solving and learn about size, order, and relationship. The act of manipulating, building, scooping, and pouring with the cups supports fine and gross motor skills while engaging in water play or knocking down the tower teaches about cause and effect. Ideal for bath time, the pool, or at the beach, stacking cups offer versatility in play from a construction focus, to water play, to role play.