I met a boy with wet hands in a public toilet. He was waving them in the air, agitated. 'Where to dry my hands?' he asked, with an earnestness that touched me.

In my time in the US, I have developed much scorn for paper towels, and it saddens me to see Singapore picking up the trend. Those hot air machines are also ridiculous. So I taught the boy my solution: you style your hair with the wetness, and it comes off. I showed him.

He didn't get it. 'Where to dry my hands?' he repeated, more urgently. I showed him again, but he still looked confused, as if the idea was too alien.

Ever wished you can change the world? One confused kid at a time.