THE DISAPPEARING STAMP!!!

Let's make a stamp disappear with the help of science!!


Materials:
A small empty jar with a lid
A postal stamp
A towel

Instructions

Fill the jar with water to the brim screw on the lid, and then dry the jar with the towel.

Place the stamp on the table.

Place the jar on the stamp.

Now walk around the table staring on the jar

Observe: At one angle the stamp disappears!!