A small red sponge ball is shown. It is placed into the hand and when the hand is open the ball has grown about 6 times as big as it originally was much to the amazement of the audience.
From the experts in sponge magic - Goshman.
First you're holding a small 2" red sponge ball. Then you push it down into your fist, open your hand and it has transformed into a jumbo 4" ball.
It's grown to double its size and looks like a huge red orange!
Only one ball is used. Self working, very easy to perform.
Dave Pib's You Tube demo below: