How do you explain a conjunction to a child?

A conjunction is a word that puts similar words together, such as me and you, or red and blue.

A conjunction can make two sentences into one: We ran. We laughed. = We ran and laughed.

Sometimes conjunctions combine different thoughts about the same thing: The lioness is a ferocious predator, but she is also a caring mother to her cubs.

Some conjunctions explain things: I fell asleep because I was tired. I was crossing the street when I saw the dog. I tripped as I walked up the stairs.