Answer:
Humans have two that shrink in the light and expand in the dark
It is something you will never see again.
Useful term for when you need to start a fire or notice someone with the same shirt as you.
Sally's mom has 5 children, Boby, Jimmy, Franky, Marly. Who is the last child?
What comes in many varieties and can't be seen or touched, but it often makes you move?
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?