Well done here
At first, the kid's remixed voice sounded a tad bit annoying. Some others might not think about it that way, but that's for them to decide :]
From 0:26 it gets really good. A nice booming basskick and a good tune at 0:41 (which first sounded in my ears as annoying, but I somehow liked it very much).
The rest of the buildup is perfect. Nice ambience followed by crashkicks and other sounds I would rank as awesomeness.
When I started writing this review I had it rated 8 stars. After some listening it would be better if I'd just make it 10 :D
5/5