After a long evening of searching the internet for children's ear/headphones these are the ones I finally chose......
These headphones are really good for small children, perfect, adjustable sizing and stylish too! The best thing is that they regulate the volume without affecting the quality of sound. The volume is always under 85db which is the suggested safe level for children without them damaging their ears. They fit in mp3, stereo, DS..............
My 6 year old daughter is very happy with hers, she thinks they are so funky!
I would definately recommend these for primary age children and under. Initially they seem a bit pricey but they are well worth every penny