Hi looking to buy a wooden cubby house for my ds age 5 and 3. If you had one, what age did your children outgrow it? I don't want to spend all that money for it to go to waste and not get used. A risk you take I guess. Also, the only place we have room for it is at the back of the backyard so I can't really see them playing unless I'm out there at all times. Your thoughts?