But you mustn't tell anyone that, Mr. Schwarz! It's secret secret agent knowledge.Alfred WeckertDon't worry, I won't tell anyone.
But it's like that. And when you bake it in the oven, you can read the writing.Alfred WeckertDon't worry, I won't tell anyone.
Did you know, Mr. Schwarz, that you can write on paper with vinegar and then you have secret ink?Alfred WeckertDon't worry, I won't tell anyone.