This is one way to use old windows, make a little greenhouse! My husband slowly replaced some windows in our house, so we decided to use the left over windows, and a few other random ones, to build a little greenhouse. The windows on top have a hinge on it so it can open, the windows on sides slide open, and other one cranks open. It worked great! I ended up putting some shelving inside and flowers around it, with little walkway. Made it look like little house.