Even a professional gymnast wouldn't be able to do that, much less a child. 1. the raptor would be too heavy for her to get a good enough kick, and 2 even if she was able to get a good kick at it, it wouldn't go through the wall. The raptors couldn't ram the wooden doors, so it makes sense they couldn't be pushed through the wooden walls. As for Zach and Gray, there's nothing about whether they are coming back or not. But I doubt they will come back. It's not like their parents would allow them to go seeking danger.