My girls are 2, 4 & 6. The 2 year old won't FULLY get it probably until the baby arrives. The others will though. Honeslty the 4 and 6 year olds could handle even bad news if I had to give it to them but obviously I'd prefer to avoid that. :)
Thanks for the info ladies. Sounds like between what you've said and what I've been reading elsewhere I would probably be ok anytime after the heartbeat/u/s but if I'm not showing by then I may hold off as long as I can. I just don't want to be outed to my kids by a friend saying "OMG you're pregnant" randomly around the holidays. But I guess I'll just have to see how it goes. We're telling our parents at Christmas (privately) b/c we'd tell them even if we get bad news at the U/S.