Sort, Stack and Play: Build it up and knock it down. Open ended toys like our silicone stacking toy make learning interactive and fun. Perfect for sensory play, motor skills development, hand-eye coordination, and color recognition. Silicone Rainbow Toy: A modern plastic-free alternative to the classic wooden rainbow stacking toy. Made from food grade silicone, our silicone rainbow stacker is durable, soft, flexible, and will never crack or splinter Easy to Clean: Convenience is everything, whether a parent or a teacher. Our silicone stacking and nesting toy is low maintenance and easy to clean. Simply wash with warm water and soap or wash in the dishwasher. You can also sanitize them in boiling water. Durable, Soft and Flexible: Made from food grade silicone, our stacking rainbow is durable, soft and flexible, perfect for children that like to chew and knock everything over. Size: Our 10 layer vibrant rainbow toy is recommended for children 3 years and up. The rainbow measures 3.55 inches high, 1.5 inches wide and 7.2 inches long. Please see the size comparison image for reference. Thank you for your interest