I'm so sorry you weren't able to save the little blood. It's wonderful that you are acting as a resource for the kids, though. You sound concerned about meeting their parents, but speaking as a mom, showing up on the doorstep is the very best possible thing you can do in this situation. I know that if my son came home and told me he had been inside the home of a person I didn't know, I'd be very, very concerned and upset.

If you just go over and introduce yourself and say that you own snakes and were answering some of their kids' questions, so you just wanted to let them know who you were and let them know where you lived, that *should* warm them up to you. I wouldn't even offer any unsolicited advice the first time over, just give your contact info, and let them know you'd be happy to help.

Good luck, and both the kids and their pets are lucky to have met you!