Ryan's pocket money

While I was sending Ryan to school this morning, he suddenly exclaimed...

Ryan: Oh no, mommy forgot to give me pocket money!
Me: How much?
Ryan $3 (that's for his lunch and recess)
Me: Do you have money now?
(Ryan checked his wallet)
Ryan: Yes.
Me: How much? And who gave it to you?
Ryan: Ah ma. $3
Me: Ok. Keep that money. I will give you the pocket money now.
(I only have 2 $2 notes)
Ryan: $4??
Me: Yes.
Ryan: I give you change? (He took out his wallet)

Ha ha.... I told him to keep it. Or maybe I should take it?