Wow.
Wow.
Wow.
The last time I checked, getting hurt was a whole part of growing up, you know, life experience. Learning how to deal with injury and pain?
Wow.
Suing to prevent other kids from getting hurt (which is a null point, regardless) or suing to be a stuck-up tosh of a douchebag parent, exploiting a situation their kid was in for more money? I really can't tell.
No matter how you look at it, suing over kids having fun and one getting a BRUISED eye is a pathetic thing to do as a parent. They should be utterly ashamed.
Luckily in Britain the threat of being sued over anything isn't nearly as high. I mean, I swear with US jurisdiction you could sue a chef to commit suicide because he didn't get your steak and chips perfect.
Suing for compensation over minor civil situations like this for the most part is just a disgustingly greedy action to partake.