This trick can only be shown once in a group as you reveal the answer each time.
Lay a sheet of paper (A4 is OK) flat on a table and place a small can of beer or food (baked beans say) or even half a glass of water, on top of the paper (right in the middle)
Challenge anyone to remove the paper without touching the can (or glass).
Pulling the paper quickly as in the "dishes on the tablecloth" trick is not allowed.
How would you do it?
Cec