"You can always learn. The library won't have a book on it, but if I have some time, I guess I could teach you the basics in a way that you won't mess up or hurt yourself."

As for the ice cream, she grabs a container of a random flavor — kiwi, from the looks of it — and thrusts it at Fionna. "Just... take some, already. If it melts or goes to waste, I won't forgive anyone here!" Said loudly and with a look around the room. Yes, girls, that means ALL of you.