Tower of Fire

My contest entry uses two mechanisms. The first is a pin that connects through a hole in the side. The robot will have to remove this. The second is a key-like mechanism that is pulled out of the top. These two functions can happen in any order. When they are both complete, then a LEGO ball will roll down into the bright green goal area at the bottom.

I think this would make a great mission because it requires two different robotic skills. It is also durable!

Dimensions: 15 cm tall, 10 cm wide, 9 cm deep.