[color:"orange"]all the pixels are way above 80x80 so I quess I can't use them. Right?[/color]

They can not be used as-is, but can be cropped and/or resized down to 80x80. Get your son to check out;

graphics programs, for editing screen shots

free web host with hotlinking? (for avatars)


BTW, I got the best quality/size for my avatar by reducing it to 256 colours and saving as a png.