We told them, except for dd4. They would have, and did hear about it at school. Dd2 had a hard time with it, because the kids were her age. We're still talking to her about it, and probably will for a while, she's pretty sensitive. DS has been talking about it with his friends, they're all appalled that someone would hurt little kids. DD1 won't talk about it.
We woke up to kids in out bed Saturday morning. They're scared. I haven't told them its happened near us before.