On poptropicas astronights where is the thing that runs on the mud?

It is in the roof of the windmill place. You jump on the propellers of the windmill clockwise and the little hatch thingy at the top should open up. When it gives you an option to enter it, do so. You should have the manure by now, if not, get it from the hay dude. The little saucer thing inside should be leaning against some hay. Click on it, and it should say something like "It needs to be powered by something." Go into your items and take out your manure, click use, and it should float out of the room. It should be down by the edge of the mud after that.