Kids are so mean. I know first hand, because I was constantly made fun-of and treated poorly in school. So much so that I don't even remember 1st - 8th grade at all. I must have blocked it out because it was so bad, but once I got to high school, things were better.
Anyway, the advice mentioned here is good advice.
It's just sad that people have to be outright mean to others for no reason. I do think it is to make themselves feel superior or better somehow. As hard as it might be, just ignore these rude people. You are better than them and they aren't even worth your time. They are looking for a reaction, and if you don't give it to them, they will get bored and move on.

**hugs**