R/C Animator lets you add sounds and lighting to your R/C car, airplane, helicopter, or boat. Effects are triggered with your R/C controller and can be combined. Here's a demo;
R/C Animator is based on the Propeller Platform USB
— effects can include changing the position of a secondary servo, playing back CD quality audio, or changing lights. On my R/C car, I'm using four LED's and a mono speaker for audio playback. Continue to the next step and I'll show you how to make it!