Diaper Changing 101

I was changing Jesse's diaper on our bed and Simon was watching.
"It's green!"
"Nah, that's yellow."
"It's yellow!"
"Yep."
A pause as he watches me fasten one side of the diaper.
"Put salt on him?"
"Salt?"
"Put salt on him?"
"Oh, do you mean powder?"
"Put powder on him?"
"He doesn't need powder right now."
"Oh."