EDIT: I no longer recommend this method because I've found a much, much better way to make a sun filter.
Ever wanted to take a picture of the sun but can't afford a solar telescope? Here's how to do it with a sheet protector and a Sharpie.
2 rubber bands
Any permanent black marker
Step 1: Cut
Cut the sheet protector along the right side and the bottom. When you're done it should open up like a book. Cut one of the two "pages" off. Unless you want an extra-strength sun filter or you want to make two, throw the other half away. Take the piece you cut off and cut it into 8 pieces.
Step 2: Color and Assemble
On six of the eight pieces, draw a huge black blob on both sides with the marker. On the two left, draw a huge black blob on only one side. Stack the six double-sided layers on top of one another. Put one of the single-sided pieces on top of the stack, ink side down. Flip the stack and do the same with the other single-sided piece. Staple the stack together at the corners. Now staple the rubber bands on either side of the blob. These will hold the filter on the camera.