The poster below is a 6-year old's explanation of the transit of Venus. Though it was created for the 2004 event, it remains relevant for the 2012 transit of Venus.
A transit of Venus is when Venus crosses in front of the sun.
You also can write down the exact time when it starts and ends.
It’s important because you can figure out the distance from Earth to
the sun.
This
is a picture of the sun rising on June 8, 2004.
You can see Venus crossing in front of the sun.
Where it says Black Drop Effect is when Venus looks like it is smudged.
The Black Drop Effect happens when Venus is almost touching
the inside edge of the sun.
A long time ago people thought that the sun was nearby like a neighbor.
Icarus flew too high and his wings were made of wax and feathers . The
sun melted his wings of wax and feathers so down he fell.
Never
wear just sunglasses when you look at the transit of
Venus. Why
you may ask? Sunglasses
let too much light in your eyes and they could hurt a little or a lot.
So use a solar filter or
special
glass (like #14welding glass or eclipse shades) .