Make a simple pendulum set with provision for adjusting the length of the pendulum to understand:
• Time period of a simple pendulum and how to calculate it
• Dependence of time period on various factor (mass of the bob, length of the pendulum etc)
Make a air propelling bazooka car to calculate speed of a moving object. Generate data to plot the distance-time graph by playing a game.
Make a sundial and understand the working of one of the oldest known time devices.