Watch a Solar Eclipse With Your Own Pinhole Camera

You don't need fancy glasses or equipment to watch one of the sky's most awesome shows: a solar eclipse. With just a few simple supplies, you can make a pinhole camera that lets you watch a solar eclipse safely and easily from anywhere. Before you get started, remember: You should never look at the sun directly, even with binoculars or a telescope, because you could severely damage your eyes or even go blind! Stay safe and still enjoy the sun's stellar shows by creating your very own pinhole camera. It's easy! Here's how:

What you'll need:

2 pieces of white card stock Aluminum foil Tape Pin or paper clip

What to do:

                                      
1. Cut a square hole into the middle of one of your pieces of card stock

2. Tape a piece of aluminum foil over the hole.
                                      

3. Use your pin or paper clip to poke a small hole in the aluminum foil.
                                      
4. Place your second piece of card stock on the ground and hold the piece with aluminum foil above it (foil facing up). Stand with the sun behind you and view the projected image on the card stock below! The farther away you hold it, the bigger your projected image will be. You can also try putting your bottom piece of card stock in a shadowed area while you hold the other piece in the sunlight to make your projection a bit more defined. Of course, pinhole cameras can get much fancier


source : http://www.jpl.nasa.gov/education/index.cfm?page=341