Parts list: 

  Small sheet of glass (free), 2 cardboard boxes (free), 1 can of flat black paint ($1.00), 1 bottle of elmers glue ($2.00), 1 roll of foil ($1.00) Total cost of project $4.00

STEP 1: Free glass.

   Here are just a few ways to get some free glass. Go to a local window or vinyl installer and ask them if they have any sliding glass doors or windows for free. You can ask friends or co-workers if they know anyone who has recently had their windows replaced. You may also want to try some free internet sites. Some sites like craigslist or freecycle have listing of people in your area who want to give this stuff away.

STEP 2: Free cardboard.

  Cardboard should be very easy to find. Just go to your local store (grocery, pharmacy, hardware, etc) and just ask them if they have any boxes to give away. You will need at least 2 boxes, 1 box to fit inside the other box. The extra box(s) will be cut up later.