mini greenhouse, would start plants sooner in the spring and protect from frost. Would also be good to cover short plants to protect from hard rain. It would be even better if the windows either folded flat to the side or came off entirely.
For the beach house* river rocks in a box + garden hose = clean feet what a great garden idea! Placed in the sun will heat the stones as well. Great way to wash off little feet covered with grass and dirt before coming inside.