I have a 3yo & a 2yo with bubba #3 due early Sept I am looking for something to protect new baby from over inqisitive siblings. I dont want to have to lock baby away when doing housework but also dont want other kids to fall on baby or tip him out of cradle. Ive looked at play pens and the like but they all look a little flimsy & easy enough to be moved by a 2 & 3 yo. Any suggestions please?