Howdy,
I got my son (now 12) a Chipmunk, two days before he was born. :wink:
So he had it for a good long time. But at 8, you've got a pretty short life for that kind of rifle with your kid, unless he's the first of many. I'd suggest a slightly bigger gun and buy a second stock, cut off the one and then replace it as needed.
As for accuracy, I don't know of many 22s that don't shoot like gangbusters.
Adios,