Another spin on the covered patio with fireplace. I love the exposed rustic beams and the high ceiling. The fireplace mantle feels a bit formal for the outdoors, but without seeing the rest of the house it is hard to tell.
This activity can help children with angles. Instead of measuring angles on paper, this can illustrate angles into a read life demonstration. This is active learning because as children close the door the angle changes and they can now measure it.