If you want your kids to be a part of the process it is very easy to make your birdhouse very simple. It is quite possible to use four or five pieces of wood and construct one with very little in the way of tools. Then there is the posture of a bird. Believe it or not, birds perch differently. For example, a Flycatcher perches vertically (straight up and down) when on a branch while a Vireo perches horizontally (almost lying down) when on the same branch.