Have you considered PiperKit? I'm not affiliated in any way, by the way - this caught my eye because it seems like you're trying to get a young one interested in software (kudos). I used the Play Piper kit to teach twenty 7-8 year olds in a summer camp a couple years ago, and it worked great. We wrote Python code and built "smart" doll houses out of cardboard with LEDs for room lights and computer fans for climate control.