58 euros thrown out the window - Unstable

My daughter got it for her 7th birthday, they played exactly 2 days trying and since it is on a shelf and looked at ONLY must be! The rooms can, set up as described flexible, which is really nice. However, it does not matter where you placed that room because it is very unstable in itself! If you just slightly abuts the house, the room to fall / down and the device must be re-admitted again and again. Here my daughter lost understandably of fun in this playhouse. Basically, would not a bottom plate are included. Through trial and error I can here assure that the original LEGO plates NOT be combined with this article - unfortunately!