I know that the diabetic community are extremely interested on these watches. 30 days of battery life, already working support for Android APS and xDrip with these watches. What is there not to like. Put one of these to your child's wrist and they can get alerts on the glucose level easily.
I would definitely get the color Pebble over many competing devices. I do not need fancy sport features, steps+sleep+heart rate covers all my needs, and 30-day battery life honestly sounds like a dream.