You can have a shadow show if you use a sheet and a bright lamp. Have someone hang the sheet over a doorway. Place the lamp behind the sheet. See Picture.
When the actors move around between the sheet and the light, their shadows show on the sheet. Someone might tell a story or play a record during the show. The actors can wear hats that make different-shaped shadows on the sheet.
If you know some magic tricks, you can put on a magic show for your friends. You will find some magic tricks on pages.
Everyone can have an act in a variety show. And it can be almost any kind of act. Someone can sing a song. Someone else can do a tap dance.