Worm Bin Building

I had my students build a worm bin in their school so that we can create organic fertilizer! There were some questions as to weather or not they could really build a roof on their own, and I knew very little of the process so I was not much help. But every day I just said 'lets get to work' and let them figure out the details, and well the strong winds didn't blow it down yesterday. Whenever they made a mistake such as not tilting the roof enough for the water to run off, they chanted 'its about the experience'.