video shows how to easily build very inexpensive solar ovens. total cost $7.50. Items needed: 2 cardboard boxes, black paint and a piece of glass. used newspaper to insulate oven. cost of optional swivel base $5.00. reaches high temperatures and cooks just about everything. plexiglass or an oven roasting bag can be used instead of a piece of glass. wool, rags, sheets of cardboard or even dry grass can be used instead of newspaper. For extra pics and info. - including pics of the completed solar ovens - click the (picassa photo gallery) website link located on my youtube channel page.