I worked at football. Once upon a time, a 10-year-old boy came to me.
Do you have any work for me?
I was so glad that there were such children, remembered myself at his age! Advertising, selling newspapers and cooked corn and many other "workings".
Yes, there is! You can clean up the dishes from the red tables, and for every cleaned table I will give you a flyer for free ice cream, you can sell them or exchange them for something, and you will earn a little money.
Well, I ran to clean up!
The guests paid attention to him and began to leave a little money for him. He asked me a couple of times what to do with them, and I said you can keep them for yourself.
A day later he began to clean only the tables on which money was left, and a few days later he only collected money.