While I'm waiting for my electronics to arrive, I had this awesome shell sitting on my desk and I thought I would make it a little more awesome (and/or ridiculous). Using this script, you can make spikes with attachments to snap on other things. As an example of what you can do, I created a bobblehead spike on top and a dragon hood ornament on the front. (note: I fully expect the dragon head to fly apart as soon as I start driving it around and running into things... but... look at it! Also: I know red shouldn't have wings, but it also shouldn't have a dragon or my head bobbing on top) This should ensure that if you find yourself around other turtle shell racers, you'll know which one is yours.
Requires Pin Connectors V2 http://www.thingiverse.com/thing:10541
Dragon Head http://www.thingiverse.com/thing:1462