HamiltonBuhl's Flex-Phones(TM) are made from a single piece of EVA foam.
EVA is a safe, non-toxic, BPA free, soft, flexible and most
indestructible product. Flex-Phones(TM) are certified for all major USA
and International child safety testing standards. Recommended for
children ages 3 and up. Flex-Phones(TM) grow with the children that use
it, for smaller children just snap on the extension band for a snugger
fit. The sound quality is clear, and most important, sound levels will
never exceed 85 decibels to protect developing years. 3.5mm stereo plug
for compatibility with tablets, mobile devices, computers, cd players
and more! Available in red, blue and black.