Science on tourne

After almost 10 years of having an annual Rube Goldberg contest in my physics classes, I decided to take a new challenge and participate with my students at an engineering competition Science on Tourne.
(official site)

Incorporated into my mechanics class (10% of course evaluation), students must build a machine that will achieve a given task. 
I hold a local competition at the college and the winning team has the privilege of representing the college at the national level.
This annual competition is held in May every year.