"Where did you learn the word 'foolish' ?" I asked.
"Well, big sister taught me the word 'fool' from the silly boys in her class. And I added 'ish.' "
On another day, I was speaking to an adult.
"I tend to find parents of an only child to be a bit more protective since they...." I paused a bit to tend to baby and my kindergarten child finished the statement for me.
"Because they don't have a BACK-UP kid?"
This was followed by tears of laughter....for a long time.