Knex Electric Train

During high school every year, I would make an electric train every year near Christmas. It was always a little bit of a challenge to improve it each year. Well, this year, I decided to tackle making an electric train again. It's a work-in-progress right now, but I figured I would give an update. I used rubber bands in the wheels in order to give the train traction. The motor is on the back wheels, and I have easy access to the on/off switch. I think I am going to make the track bigger, though. Once I finish, I will take video of the train in motion. =D