Thanks for the tip. I was thinking about something like the Rumba. I like that it is small and I thought waterproof. Scratch that off the list. My older son loves to ride the water rides and I wanted to let my teenagers branch off on their own for awhile and meet up at a certain time. I guess they can put their cell phones in ziplocs but a watch would be nice too. We also have a waterpark in our city that we visit very frequently during the summer. One of my biggest complaints is that there are only 2 clocks in the entire park! I feel like I spend FOREVER searching down my son and his friends when it is time to go and there isn't any way he can take his phone around with him.