This one of my first experiments with pistons.

Mushrooms are needed to produce mushroom stew. So I constructed a dark place where they can grow in. By pulling a lever the floor is moved one up or down (both ways are possible*) and you only have to walk trough the area and collect mushrooms. The Farm is divided into two parts, one for red and one for brown mushrooms. Keep the rooms dark!

*Befor the first mushroom is grown you can choose, in which position the floor should be: it is easier for you to start with the floor lowered, because you just have to walk trough the chamber when you harvest them, BUT there is a chance for the mushrooms to "fall" away in this starting position, so I recommend you to start with the floor pushed up by the pistons.

Do not try to work with water to transport the mushrooms, I have tried it and the redstone circuit was destroied!!!

Have fun and do not forget: in RL the red ones are poisonous!!!!!