The Archos is a nice little device and I purchased this for my 7 year old. She can work the device without any issues but I did notice some issues.
My main issue is with the volume, the level resets each time you turn off the device. Personally I feel the default is too high, especially for children.
The video and photo functions are not worth it. The screen is too small and images take an age to load.
To end on a positive, the mp3 function is very good and the ability to recharge the device is great.