Try this festive sound experiment and make the pipecleaner tree spin using sound waves just from your voice! Start by twisting pipe cleaners around your finger into the shape of trees Stretch clingfilm or plastic wrap over a bowl and place the pipecleaners on top Get close to the bowl and shout out loud or through a tube to amplify sound. You can also try playing music near the bowl or humming at different pitches to make the plastic wrap vibrate Watch the pipecleaner trees as they spin and danc