OomplzThese fun, bright, textured and STICKY cups, provide endless tubtime play while helping your child build a variety of skills! Oomplz allow your little ones to explore: water transference, suction tendencies, a variety of sprinkle effects and water's relations to gravity. Your child will soak up fun with Oomplz! Encourage and support: Cause and Effect, Sensory Exploration, Hand Eye Coordination, Motor Skills, Cognitive Development. Easy peasy stack and