Griffin has launched headphones for children - the MyPhones - that have a maximum volume limit to "protect young ears".
The MyPhones cap volume at 85 decibels, apparently the maximum sustained volume level as recommended by regulatory agencies. In addition, the headphone design means they don't go in the ear so are also thought to be safer in that respect.
To try and make the safe choice more attractive to nippers, the MyPhones can be customised. Kiddies can design their own shell caps and there's also a "GoCase" for on-the-move.
Griffin's MyPhones are available in Apple stores worldwide, although a quick keyword search on the UK online Apple Store brought back nada.