Follow these step by step instructions to make a cover for your Kindle or other E-reader out of an old hardcover book:
1. Cut out the pages from a large book, and glue a strip of felt to the inside of its spine.
2. Cut two pieces of cardboard to the size of the book’s covers. Snip off the corners of the cardboard, and glue pieces of felt over the cardboard pieces.
4. To add a cover strap, cut holes in the back cover of the case, and pull a piece of elastic through them from the inside of the cover. Measure how long the elastic needs to be to keep the case closed, cut it, and glue the ends to the inside. For more details, go to instructables.com
Five amazing, clean technologies that will set us free, in this month's energy-focused issue. Also: how to build a better bomb detector, the robotic toys that are raising your children, a human catapult, the world's smallest arcade, and much more.