I'm also going to ask what the hell your kids are doing in the yard, close enough to a running mower that you need to stop for them to get out of the way? I mean, I mow when my kids are outside, on the opposite end of the yard, and I mow just at an acre, so it's a good distance away. With or without a hill, if they don't know enough to keep out of the way, you need to make them go inside while you cut the grass.
