Make: Volume 86

Projection of the

eclipsing sun on the

back of the box

Full sun

projection

CAUTION: Be very careful! This is a cut with a

sharp blade on thin metal that should be made by

an adult wearing cut-proof gloves.

You can also try to make a lens with layers of

aluminum foil and scissors if you like, but I find

that this lens is too delicate and flimsy when

transporting the viewer. If you do use foil, try and

get it as taut and flat as you can.

After the lens is cut, tape the aluminum over

the rectangular hole in the box with opaque tape.

Using a thumbtack or tiny nail, poke a tiny hole

in the aluminum (Figure

C

). This hole should be

very small, not even ...