Also when out and about in a crowded area (tourist attraction or the like). Instead of writing your phone number on your todders arm, Write on a business sized piece of cardboard, your name and phone number and explain to your child if they cant find mummy, go to the nearest shop and give them the card.
Also when we went to sea world last time, i acutally pulled up an employyee (asked if i could borrow him for a second lol) and showed my children the uniform to look out for if they did get lsot ie someone wearing those clothes.
He was pretty good about it too and suggested that its something more parents should do.
Sharon, 24, Qld, 2 boys 3 & 5, girl 1.