Best for kids 5+ unless you have a big headed kid like my 5 year old who got his headphones when he was 4 and fit then great. They advertise 30 hours of use on a full charge. These shoes are pretty heavy compared to the light-weight tennis shoes. The crystal wall hooks completed the shelf I made perfectly. I get this model again and again but this one was smaller than expected. My advice to anyone purchasing these is do not remove the tags or throw out the packaging until you are sure you want to keep them and the size is right for you. With this, there is no excuse to take them off. This makes for a very comfortable tee-shirt-like fitted bodice and flowie skirt. Dont waste your time or money on these. I can even wear them outside without the damp grass not seeping in.