Silicone Happy Stacks are the new must-have Montessori toy. Classic stacking cups just got a massive upgrade. This set of 7 square silicone stackers teaches stacking, nesting, counting, and sorting to develop concentration, problem-solving and gross motor skills. They’re great to have around the house, for everything from playtime to mealtime and even bath time. And they nest together, which makes them perfect for on-the-go. Uses: Playtime: Sort, count, nest, stack, knock over…. and repeat. Our long-lasting stacking cups are both durable and do enough that they can be used from newborn stage through the preschool years. Mealtime: With solid bottoms and made from FDA food-safe silicone, each cup can be used as a food container. Perfect for snacks, dipping, and keeping food separate! Water Fun: Fill, spill and bubble it up. Happy Stacks are made for water play. In the bath, pool, or ocean, they can handle the fun.