To design a simple motor all we need is a number of batteries, neodymium magnets, metal screws or nails, and some copper wires (they do not get attracted by magnets, and they conduct electricity).

The 4^th graders were super excited when Bala and I entered the class with a box on our hand. Then i explained that we would be doing a small experiment with magnets and some batteries. We split the class into four smaller groups and handed each group the required number of components. The explanation on how to connect the components was shown, and the children made their own motors. While doing the motor they realized that when the batteries polarity were reversed the direction of the spinning screw also reversed.

Once the children were done with the motor, they did a puzzle on water and weighing.

” If you had a 5-liter bowl and a 3-liter bowl, and an unlimited access to water, how would you measure exactly 4 litres. ”

all came up with interesting ideas and explanations.