I am throwing a sip and see for a friend, and we want to state on the invitation that it should be adults only, because her baby will only be three weeks old and she is afraid of germs. I can't think of a way to word it so it wont be tacky or rude. I was trying to come up with a lighthearted rhyme...any suggestions?

ETA: a few things I came up with quickly. They are rough and need work. I don't necessarily need to do a rhyme, I was just trying to "soften" the blow.

"Kids love company, but newborns are best left alone
Just in case of germs, please leave your little ones at home"

When Baby K gets a older, we'll arrange a time to play
But she's still a little newborn, so please keep your kids at bay"