One option may well be a gypsy house (wagon) on wheels, in which every kid will feel like a master. Small home theater productions of fairy tales and plays can be staged in it. Kids will be happy to keep their first secrets here, to gather with friends to discuss all the important things.
Let such a miracle appear and in your yard, will give impetus to the development of creative abilities of children. They can turn into nomads or wandering artists in the game. This will be a favorite place to play, as well as protection for its owners from the summer heat and sun. The presence of wheels will allow parents to move the house as they see fit. What could be better?