lol that would work right up until I took the bag out, my cats are freaking smart(well, one if them is anyways), we have a ssscat thing that blows a puff of air at them if they enter a room(we tried it for the nursery) and one of my cats stared at it for a couple days and realized if she ran fast enough past it it wouldn't get her.... we eventually decided to only leave the nursery door open when we are in there.
We actually wont even have a nursery anymore, for a while, once baby moves into the crib(moving into my parents' garage temporarily due to military discharge), though, so baby will be sleeping most nights in the same room as the cats.