My props go out to the blog Free Safety and Risk Management Resources for bringing this product to my attention: SafetyTat’s temporary child ID tattoos.
We all worry about our small kids getting lost at Disney World (or the Toys R Us in Times Square?), so why not temporary “brand” your kids with your contact info. Great idea. Check it out at http://www.store.safetytat.com/store/
I suppose if that’s not quite good effective enough for you, you can call in Kat Von D to do something more permanent.