I was also useless at sports. Looking back, I do wonder if the difficulties I have now in my hips were perhaps not at work when I was younger, I often had knee pain (I have that now but it's actually part of the hip thingy apparently) but was either put down to growing pains or laziness... given that I was growing and I am particularly idle when I want to be, it would really be a tough one to call! ;o) I was utterly useless at atheletics, my ball skills are on a par with that tinned tuna fish, my balance and co-ordination are at the same level as my tact and diplomacy.... I know I sound modest but i assure you it's true.
However, I am a very good swimmer and the small amount of martial arts I've done I seem to have a little flare for. I would have loved to have done more martial arts from a young age in school. As it was, whenever we did do it then it was only cause someone had come to the school for the afternoon or somthing, my mum couldn't really afford to send me to any of the local clubs. I believe martial arts do teach you disapline, self respect and self worth.
I also agree that first aid should be taught to kids. It should be taught to as many people as possible really.