Redruby, I would recommend getting a pair of gerbils since they are happier in pairs.
Make sure the people at the pet store give you a pair of the same sex so that you don't end up with babies!
I got my two gerbils in November and they are a lot of fun to have around.
I would recommend getting them an exercise ball to help them burn off energy so they will be quieter at night.
This is one of my gerbils, Chocolate in her bubble ball.

Also make sure that they have a lot to chew, like cardboard tubes.
Good luck with getting some gerbils and be sure to post some photos when you do!

Cali, I was wondering how your project with the gerbils went.
Do you have any new photos of your gerbils?