Make a hand fan. Some suggested designs below:
Switch off the ceiling fan. Make one student fan each other. Then ask the student who is being fanned to leave the room for 2 minutes.
Discuss: What did the pankha wallah do when the student left? Why did they stop? Why do we continue running fans even when no one is in the room?
How much energy is required to power a fan? Get people to actually make a fan and use it. Talk to the children about switching off lights, fans etc. when not required.
Quiz: Why do we feel more comfortable with a fan?