On 8/5/2015 we had design and we started a new plan and a new project it involves a train track, car, big car board box,  and a house with a doorbell. it has a sort of pulley made out of lego and string that comes down to the train track, with the car in it and the car starts to roll down the train  track with a pin on the front the touch the doorbell and when it touches it the doorbell goes off!

Our first design was the same thing but the pin has to touch a light switch, witch puts on the light, and I am not sure if why we changed it but I think we changed it because it was a bit to hard to find a right spot to fit the design and the box was a bit to big to fit in a tiny place that we thought that was right so we have changed it to get the doorbell to ring