At our last house, we went through six trees (two at a time) before Ben stopped turning them into mulch. The only reason the last two trees made it is because we moved.
Jake and Ben haven't paid much attention to these trees so far, and I'm hoping that trend continues. I think we have a chance but only because Jake is 10 now and Ben is 7. We've got our fingers crossed! Funny thing is though, as I'm typing this, Ben's trying to break into the hydrangeas that we fenced in to keep him out. Gotta go!