If you like skating have a look at this cool Automatic Skating Sound Effects project called Bauxite over at Skate Hack
Via: Make
“Bauxite is an open source portable skateboard box embedded with piezoelectric sensors, customized hardware and software and portable loudspeakers. As the skateboarders ride on the box, the piezoelectric sensors convert physical vibrations into triggers and generate a selection of pre-recorded sound-samples amplified through loudspeakers. Skateboarders interact with Bauxite through tricks and movements transforming an ordinary skateboard box into a skateboard-powered music sampler!”