Being made fun of?
I'm in 8th grade as well and I sometimes feel as though I'm the onlu teenage model railroader in the world, and yes, I am regularly made of. Or, rather, I would be, if I was hanging around with the sort of people that make fun of people. I am actually one of the people that will occasionally make fun of others. The reason why these people do it is because you are either:
1. Attempting to fit in and not doing a good job at it
or
2. Completly stupid and unable to do anything right at all. Hardly anyone fits into this category.
One way to avoid being made fun of is to stop trying to fit in. Most teenagers have a mad urge to "fit in." Someone has to lead, and that leader never tries to fit in. I used to be the geek/nerd/smarty-pants. Then I did something completely crazy. I used my talents to make something cool. In my case, I used my talent as a computer guy and my talent for having a Macintosh computer to make an entertaining movie for my class. Shortly afterward I became one of the most popular kids in class. So my advice would be:
Don't try to fit in! Stand out! Be assertive!
and
Get a Mac. You'll never want to use Windows again, and the programs included in iLife will allow you to do all sorts of creative things no one would think you'd be able to do like movie making, composing music, and making fully fledged DVDs withy menus.
Of course, you can use any skill you have. Model railroading? Build a model skatepark, or whatever it is that these people like, and show them that you can model anything.