Noob Project - Pinewood Derby Car with fan

Hi There

My son would like to participate in our Pack’s “Outlaw” division in this years Pinewood Derby race.

He wants to attach a couple of fans to the back of the car … we were originally thinking of canibalizing a mini-drone but I think the hobby motors on this site would work just as well with a couple of mini replacement rotor blades.

I was thinking of using these parts:

https://www.sparkfun.com/products/11696

https://www.sparkfun.com/products/11278

http://www.robotshop.com/en/hubsan-x4-m … llers.html

http://www.robotshop.com/en/hubsan-x4-m … ttery.html

http://www.robotshop.com/en/quadcopter- … board.html

What I’m not sure about is the switch - I’ve heard of guys using a with that you can depress … and when released (i.e. the bar drops for the derby race to start) the power to the fans is engaged.

So I thought I would ask the experts and see if you guys have any ideas about how this might work.

Thanks for any ideas or advice!

Jason