It may look like a Frisbee but here's why it won't act like one: our edgeless plates have an ingenious rubbery slip-resistant bottom, so your kitchen floor won't turn into a debris field with one swipe of a tiny arm. Wash the plates thoroughly before initial use and after each use. Wash each piece separately. The plastic plates for kids are dishwasher-safe or hand wash in warm, soapy water. DO NOT microwave. DO NOT boil or sterilize.