Hamilton Buhl Flex-Phones are nearly indestructible, made from a single piece of EVA foam. Eva foam is safe, non-toxic, BPA-free, soft and an extremely flexible material. Best of 2015 scholastic teacher's pick Flex-Phones are certified for all major USA and International child safety testing standards. We are extremely proud that they have been awarded the scholastic teacher's pick as "the best of 2015". recommended for children ages 3 and up, Flex-Phones deliver high quality sound that will never exceed 85 decibels, ensuring young developing ears are protected. Constructive Playthings is committed to providing safe, compliant products and a healthy, safe working environment worldwide. Constructive Playthings fully complies with the CPSIA and works closely with our suppliers and third party, CPSC approved laboratories to ensure we meet regulatory requirements. We require that all products meet all applicable federal regulations, which we review on a continuous basis