Automatic redemption stall (unmanned vending stall)

Today, my nephew sent me these pictures. I was quite surprised. Not only did he come up with this idea (creative concept) and put it into practice, but more importantly, I seem to see a kind of leaping and surging energy in him, which might make a person look back years later and feel secretly excited.

Nowadays, there are many automatic ticket vending machines. On the streets here, there are also some unattended bicycle tire inflation stands, costing ten cents per use, and people are very self-disciplined. Also, I remember last year when I visited an exhibition at the Guangzhou Art Museum, where there was a photo from the 1930s-40s showing an "unmanned sugarcane selling stall." It's all based on the same principle—testing people’s level of moral awareness.