Arduino Race Car

I use this laser cut race car in workshops for kids. You can fit an Arduino uno on top and a battery below. You can add a servo and a HC-SR04 using http://www.thingiverse.com/thing:100486 (works great thanks!!). In front you can add some line tracking sensors (future update).

I haven't made the file customisable for material thickness. When I have time I'll update the file. I have used 4 mm MDF.