TINA: What are you doing?
DAVID: I'm trying to fix my pen.
TINA: What's wrong with it?
DAVID: I'm trying to get it to write more quickly.
TINA: Well, that's easy! Just write faster!
DAVID: I've tried that but it doesn't work. I think if I make a pen that has a machine in it, I'll be able to write faster.
TINA: That's a funny idea.
DAVID: No, it's not. Thomas Edison said he liked people who had ideas. I think this is a good idea.
TINA: But if the pen writes too fast, how will you be able to write neatly?
DAVID: Good question. See, now you're thinking too. We can come up with the answer together.
TINA: OK! You put the machine in the pen, and I'll try to use it to write quickly and neatly.
DAVID: That's a good plan, isn't it? We just need to keep working on it, and not give up.