Because of COVID-19, I am being temporary laid off and my kids are out of children for a certain period of time. We have to do some home schooling. Besides thinking about academic learning, I still need to think about something else to teach them, including art, physical activities, science experiment, etc.
One of the science activities we did is Newton's Cradle, my kids called Marble Cradle. We were going to experience the scientific theory of force and transformation of energy.
Truth to tell, it's a bit difficult than I expected.