This is a funny and basic train toy. I make it for a car race of my University (Carlos III, Madrid).
-> Rendered image and files ChucuchÃƒÂº V1 .scad and .stl, are only for a global vision, THEY ARE NOT PRINTABLE < -="">
Here you can see how it works:
((Photos and video are from old version; I still haven't had enough time to print the one new.))
Enjoy it!! ^^