The guy is 9 yr old, and appears to enjoy taking photos. I don't think I'll give him access to my camera system and lenses. :) But I'm thinking to find him a neat little compact camera.
Requirements: Cheap. Configurable, within reason - would be nice if he could tweak the ISO, shutter and aperture manually, if he is so inclined. Also, it would help if the camera is not a total piece of junk.