Skullcandy Grom Over Ear Wireless Headphones for Kids,

Volume-Limited and Kid-Safe – These wireless headphones are designed to be straight forward and safe for children with the volume limited to 85 decibels. A Volume Limit Override enables users to listen in loud situations, such as air travel.
Share Audio Port – We got you covered on multi-kid journeys too. With a shared audio port, tiny travelers can watch movies together on the road or in the sky.
Hours of Power – Grom Wireless delivers 45 hours of tunes per charge in addition to 4 hours of playtime on a 10-minue charge.
AUX Cable for Wired Listening – An included 3.5mm aux cord means you can also plug in anytime, anywhere.