an activity with tuning forks
Activity 1:
First, strike the tuning fork against the rubber pad and touch its one prong with a small bead suspended with a thread. The bead will be set into vibrations indicationg that the prongs of tuning fork are vibrating about their mean position.
Activity 2:
After the tuning fork is sruck against a rubber pad and the tuning for is held upside down in a basin of water, you will see waves in the water, because of the vibrations of the tuning fork.
Activity 3:
If you want, you can bring the vibrating tuning fork near your ear. You'll hear some sound.
I hope these activities might help you..