Lemina sighed, perhaps a bit too dramatically. Oh god. What. How.

"It means, um." If Pip didn't understand buying she wouldn't understand money either -- the poor soul -- so Lemina tried to put it in simple terms. "You trade things for the things you want. That's what we call an economy! Except that trading items back and forth would get too complicated -- Like, say you wanted some fruit and all you had to trade was some nuts, but the person selling... uh, who you're buying the fruit from doesn't want nuts. That's why we have this nifty thing called 'money'. You pay money for the fruit, and money can be used to buy literally anything you could want!"