William took a few of the library books on solar power back to the library. These books were on changing a whole house to solar or they were too technical for us. We still need to get on websites to see what we need to do.
The kids want to build a solar oven. We started one a few years ago, but we didn't finish it. It was one that needed two boxes...it needed other supplies but it was so long ago that I don't remember what they were.