Great idea? More like AMAZING IDEA!!! Summertime means lots of theme parks, zoos, adventures for the kids and what's one of our biggest fears as parents? That they will get lost and we won't be able to find them! So, here's a simple solution! Use a fine point sharpie or pen and write "If lost, call (your phone number)". Then use liquid bandaid on top of it. It will seal it in and it's waterproof and should last for about a day.