Saurabh
Sanjoli: Mamu, teach me about batteries.

Me: Charge, electricity, positive, negative, North Pole, South Pole, current, voltage, watt, joule, power, work, rotor, stator, alternating current, direct current, electron, proton, moron.

(2 hours later)

Nilay: (passed out long ago)

Kavin: All that is fine, but question, question, question, question and question. Also you made 3 mistakes. I've been keeping count.

Sanjoli: This was useful. But I'm tired. Can we continue in the morning.

Meethi: Oooh. What does this button do?

Next morning...

Sanjoli: Mamu, can you teach me about batteries?

Me: Here are your books. Read all about batteries. Yesterday I taught you all about electricity.

Sanjoli: Yes but I had to learn about batteries.

Me: Now you know what it's like to be Nilay and Kavin.