Yes, and also learn some tricks that allow you to do square roots and such in your head so you dont need to be glued to a device all the time (perish the thought lol!)We sure do some arcane things as children. I mostly did that sort of thing to impress my parents, but memorizing square roots and such is always useful later in life.
I mostly did stuff like calculate what the minimum visible magnitude should be for various aperture binoculars and telescopes and also things like the difference in luminosity between two objects of different magnitudes. So it was practical and learning to do it in your head saves you having to carry electronics outside which could ruin your eyes' adaptation to the dark.
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