Lindy - mine are only 31 & 29 & I still text to say we've arrived safely, and when we get home I text to say that we've landed. I also ask them to return the courtesy when they go away. I usually text the youngest and she lets her brother know. I've also got it in case of emergencies. My dad had a heart attack in Majorca a few years ago & if mum hadn't had her mobile with her she'd have been in even more of a panic. Forgot to say - just the one watch - a cheapy I bought in the airport a couple of years ago.