One of my friends is in prison, so it happened. And he asks her in a letter to send her a set of glasses. The usual glasses. My mother didn’t want to send anything at first. But then came a wonderful idea. She took simple glasses and made prints on them: "Do not kill", "Do not steal", "Do not steal" and so on. When she talked about her idea at work, the girls went down with money to buy her glasses. And when she came to a company that makes prints, she had another 50% discount on such an order. This is a home crowdsourcing.)