If you give a Mouse a Cookie, by Laura Numeroff.
If you give a mouse a cookie, he's going to ask for a glass of milk. When you give him the milk, he'll probably ask you for a straw. When he's finished, he'll ask for a napkin. Then he will want to look in a mirror to make sure he doesn't have a milk mustache. And on, and on and on. Then he gets thirsty, wants some milk, and he's going to want a cookie to go with it. The End.
If you give a Customer more Services, by Adam Kaplan.
If you give a Customer merchant processing, he's going to ask for a terminal. When you give him a terminal, he'll probably ask you for a stand for the terminal. When he grows out of the terminal, he's going to ask you for a POS system, and then he's going to ask for some printers. And as he grows, he will ask for cash advance, EBT, multi-lane solutions, gift cards, loyalty, QR Code payments, spill covers, paper, ink, kiosks, and robot delivery solutions. And then his success will make others notice, and they will ask him how he did it, and he will say "this is who helped me do it", and they will refer more business to you.
The End.
The full If you Give a Mouse a Cookie animated video book: (10 minutes long)