Games, in the old days, often helped sharpen skills needed in adult life. Games were also just for fun. Games would reflect the environment the children lived in, as well as their culture. It rained a lot there, and one can imagine the children having to stay indoors and responding to nature outside. They made up a game, creating the sound of a rain storm using the wooden floor.
Teacher asks what often comes before rain.
The wind often picks up. Have students make circular motions on the floor and it will sound like wind. Teacher next elicits that what often comes next are the small drops of a rain shower. The sound is made with the fingertips striking the floor softly, then a little harder. A leader shows the students how long to have the wind build up, and when to start the raindrops.