Spinners, Spoilers & Derby Cars!!

My two older boys love everything having to do with cars. Their favorite thing to see and point out are "Spinners". I personally hate them, but hey, I'm a cool mom, they are boys--I totally get it! The other thing that my 8 year old loves...rear spoilers! He loves them so much that he is begging for one on his Pine Wood Derby car. Now--being the master car maker that I am---I will do my best to live up to this request--I'm just happy they aren't asking for Spinners as well! I'm almost sure they would be disqualified!