When the bell on top of the school's Leaping Tower keeps ringing, Sparks' Crew plans and conducts an investigation. They discover that vibrations make sound, but what's causing the bell to vibrate and ring?
When the bell on top of the school's Leaping Tower keeps ringing, Sparks' Crew plans and conducts an investigation. They discover that vibrations make sound, but what's causing the bell to vibrate and ring?
