The kid was sitting mesmerized in front of their computer for at least an hour thanks to this randomly found gem: https://paveldogreat.github.io/WebGL-Fluid-Simulation/
Webgl Fluid Simulation

A WebGL fluid simulation that works in mobile browsers.

@floe Just a side note:

The kid was also tricked into the unconsentful transfer of his personal data to Google by this website.

Just so anyone who cares knows.

@nik Good point, although we have a PiHole in our home network that takes care of most adware. And it's not a "he" πŸ˜‰