What does a start menu replacement have to do with the child not liking to touch the screen? Why not just teach the child to use the trackpad or a mouse? Why does that warrant a start menu replacement? That doesn't make any sense.....
He had Windows 7 on his previous laptop (Linux on his desktop) and was comfortable with finding his way around the start menu. With all the games and stuff he has installed, and the laptop scren being only 14", he had to scroll horizontally to find all the apps. I ruined his laptop (fell out of my jeep) so I bought him a new one to "replace" it. The new one was different, so I got start8 to make it as close to what I destroyed as possible.
I didn't get him the laptop so he could learn a new interface that may or may not be around in another year. I got it to replace the one I destroyed. If I broke his baseball bat, I wouldn't get him a tennis racket and then tell him to just learn to play tennis instead.