Phew

Hamad: Teacher where would we find the negative and positive charges inside us?

Me: Okay see, you are really made out of billions of veeeeeeeery tiny things called "atoms" and inside those extreeeeemely tiny atoms you'll find the charges.

Hamad: I'm made of atoms?

Me: Yes Hamad lots and lots of them. You're FULL of atoms.

Hamad (visibly horrified): ONLY ME TEACHER?

Me (cracked up): no of course not! So am I!
Hamad: And Ahmed?
Me: yes and ahmed.
Hamad: And Khaled and Saod and Abdulla???
Me: Yes EVERYONE and EVERYTHING.

Hamad (able to breathe again): Oh okay.