I introduced my kids (13 and 11) to the sofa problem last week as we installed this cabinet organizer from IKEA: https://www.ikea.com/us/en/p/utrusta-corner-base-cab-pull-ou...

After showing them a youtube video about the problem they saw clearly how the organizer is a sofa and even made a joke about it a few days later.

Relatable math is pretty great. Also really cool is showing how academia translates to enriching our lives in benign ways.