Such is the nature of kids: if there is a little hole in something, they pick away at it and the hole grows bigger by the day.
I had a tiny hole in the fabric on my living room sofa. It was on the arm of the couch where someone had snagged their jewelry perhaps, and made an eensy tear in the fabric. It was when my house was busy with my 7 kids, and although I reminded them not to put their finger in it until I could repair it, it got bigger day by day. Soon a little wisp of stuffing was coming out and day-by-day that hole increased unbeknownst to me until I suddenly noticed that the couch arm looked deflated. The little ones had found it just right for their finger to poke in and pull out a bit of stuffing. Day-by-day, it had eroded.