Stained Glass is a beautiful project to do with your class! It is one of those things that mommas keep hanging in windows for years and years!
To do a stained glass you will need for each child: one piece of black construction paper, one overhead transparency, bottled glue and a bunch of 1" tissue paper squares. You will also need either white crayons, white pencils or metallic pens for the kids to write with on the black paper and some baby wipes.
It is much harder to explain in words than to show you, but here goes...
Before class, cut the image you want. Tape a transparency to one side of the image.