Do you do any simple experiments? Or track things and analyse them? - SDF Chatter

Recently downloaded the phyphox [https://f-droid.org/packages/de.rwth_aachen.phyphox/] from F-Droid and thought about this while thinking about what all stuff I could do with it. Are there any online resources about such stuff? What all things have you(or people you know, in your locality etc) done along that line? And not only big thigs, if you’re tracking other stuff, please do share your experience on that too.