Gather 2-3 large pom-poms, a large container for water, and a small opaque cup or container.
Pour water into the large container and sit it next to the empty small cup or container.
Pick up a pom-pom and dip it in the water.
Hold the wet pom-pom over the empty small cup or container and squeeze the water into it.
Continue squeezing water out of the pom-poms until the cup or container is almost full.
Talk about how Moses hit the rock with his staff and water came out,
just like water was coming out of the pom-poms!