A decorated stick
2 buckets (one for rocks, one for water)
A few rocks
A branch of a tree with the leaves intact
Have two volunteers hold up a blanket or sleeping bag and stand in front of the audience.
Tell the audience that the stick that you are holding is a magic weather stick, and it can predict the weather.
Hold the stick above your head and say “I think it is making a prediction.” Hold it up to your ear, and pretend to listen to it. Say that it says that is going to be windy, and have someone move the branch around in your face, as if it is windy.
Then say that it is going to hail, and have someone move rattle the bucket with the rocks in it and act like it is hailing on you.
Then say that it is going to rain, and have someone throw the water on you.
Feel free to make up your own weather predictions, but you get the idea…