Archimedes Principle (sort of) and the Boy's Theory of Relativity

I like to bucket water from the kids' nightly bath out onto the pot plants. It makes me feel like I've done something constructive with my day.
One day I was trying to take advantage of Justababy's naptime by doing just this, but Boy wanted me to stop and play. I explained I just needed to finish emptying the bath first.

But...mummy...you can just pull the plug out, you know. *

Then I tried explaining about time - specifically the need to complete tasks within set time frames. Boy was unimpressed.

But...mummy... time isn't real, you know. It's just imaginary. *




*Imagine this in your best god-she's-so-silly tone of voice