Bought new Casio G-Shock G7510-1V for $59 +$3 P&H from Redbird
G-Shock has been the epitome of shock resistant watches and I bought one for my son as I think he is now old enough to need to wear a watch when he is out of the house. I got the G7510-1V model for just $59 from Redbird and I think it's great since it not just tells time and has alarms but I can also program names and numbers into the watch itself for whenever he needs to be able to call us. He still can't quite grasp the concept of a multi-digit mobile phone number so this is great. Also, in the worst-case scenario that he gets lost, any adult can contact us regarding his whereabouts. Approximate battery life is 5 years so I won't need to worry if it is still working or not.