Constructing a Mouse Trap Car for Distance Challenge

[axellviii]

Mouse trap car!

i need to make a mouse trap car that goes 7 meters forward and then goes 7 meters back.

 

[story645]

Details, specs, etc. What are you allowed to use? What are your limits? What have you attempted? What's you're starting point? etc.

At the bare minimum:
PIC microcontroller/Aurdino + motors + wheels + mousetrap