Been there done that.I was associated with the Cub,Boys and Weblos when the boys (2) were growing up.Pine Wood Derby time was always a hoot.The Dads got more out of it than the Kids.

One of the features we used in the cars was a weight system just behind the wheels that gave it a trampoline effect at the bottom of the ramp.The front wheels would do whellies as it entered the straightaway.We had a blast.We won a few and we lost a few as the car would leave the track on occasion.