Yeah, I like that. I will mention this to the wife.
This topic is upsetting just to think about it. It happened here in Texas just recently.
I remember reading about a device that you can attach to either your child or to a stroller/car seat, and it has a another device that attaches to your keyring or to your purse. If you move the devices too far apart, it start to beep, alerting you. Great for wandering kids, too.