Make dudup sticks. For children or a small stick, take 6 inches of a 1/2-inch dowel and wrap rubber bands at both ends.
Cut a rubber ball in half and glue one half to an 8-inch wooden dowel for an adult or larger dudup stick.
Make a hole through the middle of the rubber ball and add more glue at the hole to better secure the ball.
Rest the can or barrel on a flat surface that is firm and solid.
Draw a line slightly off center across the top of the can or barrel. The line should divide the round area of the can into two slightly different sizes.
Pound a hammer up and down the drawn line, making a valley along the line. The valley stretches the two areas, making them tight and resonant.
Test the drum periodically to make sure each side is producing a different sound. As the tension increases the different sounds will become more apparent.