If you were limited to only using a single mouse trap and cheap raw materials from a local craft store, how would you design a "mouse trap car" to pull a mass of 200g (soda can w/mass)? I'm looking to maximize the mouse traps distance traveled and speed. I'm looking to minimize the weight of the total system. I was thinking of a 2 axle setup with larger wheels in the front and smaller in the back to prevent lift when it accelerates. For the motion mechanism I am leaning towards a "yo-yo" effect on the wheels that when the trap goes off, a string that is tied to the metal clamp on the trap unravels the string tied around the wheels. I'm currently testing new ideas and trying to optimize as much as possible. How would you design a mouse trap car to achieve the previous stated goals or how would you better the design that I am leaning towards?