Each year in January Pack 177 holds its annual Pinewood derby. Scouts are given a block of wood and 4 wheels to design and create any car they wish.
DERBY CAR RULES
ALL cars must be surrendered at the official weigh- in.
ALL cars must conform to these specifications;
Width shall not exceed 2-3/4 inches.;
Length shall not exceed 7 inches;
Weight shall not exceed 5 ounces.
EVERY CAR MUST HAVE A NUMBER ON IT.
Here is a great website provided by the BSA, that will answer all the questions you ever had about the Pinewood Derby.