K.S.
That happens alot to my son too, and usually I just tell the bigger kid that someone is trying to come down the slide and he needs to stop climbing up the slide. The kids will stop or just move to another slide. So far I haven't had to say anything to another mother, but if I had to, I certainly would. You are your childs voice and because you didn't stick up for your child, he had to stop playing. Next time it happens (and it will) if the kids don't listen to you, then just go over and nicely say something to another mother. I'm sure they won't get mad at you, they'll probably just say something like "oh! I'm so sorry I didn't See them" and hopefully tell their kid to stop. Just remember K., if you don't get up the courage to stand up for your kid then who will? I'm sure you don't want your kid to be walked on his whole life. I think if you look at it as standing up for your child rather than being confrontational then you will find it much easier to do, and after you do it once, then you'll feel so much better and wonder why it took you so long!! You can do it!! :) Good luck!!