Don't attack me but I find it odd. I wouldn't take my kids to play if they were sick, and if another child was sick I'd probably keep my child away (and if I knew the parent well enough ask them to either tell me when their kid is sick so I can stay at home or ask them to... that baffles me to even need to ask as its just good manners) but otherwise it wouldn't bother me. Yes I do think kids need to be subject to germs although I can definitely understand prem mums being cautious though. I would just worry about it affecting children learning to share, and also perhaps cause anxiety. Can't be much fun to constantly stress over toys. Did I mention I never did mother's group LOL I think I am glad! Playdates sound a lot less stressful!