While they are old enough to know my phone number, I was worried that if they get scared and panic they would have a hard time remembering

I bought these ID bands while traveling alone with my toddler, who is at that age where he can run away from me really fast, but he can't say his own name clearly yet, let alone memorize a phone number

Your children might know your phone number, but if you are international, they will have no idea how to reach you

One the last day i just wrote my phone number on his hand