I raise goats in a very small area. (1/4 acre) Since I don't have much room for running, I have decided to build up to give my goats plenty of play space. So here are some pictures.
My children love playing on the spools as much as the goats!
Note the goat with it's head through the openings in the bottom spool. We feed grass pellets in there. Safe from the rain and snow, also safe from goat droppings!
Door open so you can see the goat eating inside
Another area I have set up. The goats love sleeping in the elevated dog house and they slide down the slide over and over again. It is hysterical!