There is a sunroom downstairs in our home. It Faces the South-West, and gets a LOT of sun. In the winter, the thermal property of the room allows it to heat almost the entire downstairs. The problem is that in the summer, it's like the inside of a volcano. The room serves as a playroom for our 4 daughters, and we really need it comfortable.
We don't want the windows blocked, because we love the natural light, and the wintertime heat, but something has to done about the summer.
The entire wall is glass. It has a triple sliding glass door, and floor-to-ceiling windows.
We can't use expensive drapes, because three of the girls are age 4 and under, and they can't keep their hands off them.

Help please.