Wearing pajamas: Shedding your work clothes and slapping on those PJs definitely takes some sort of “calorie burning” effort.
Drinking 2 glasses of cold water: Apparently you can burn 100 calories this way. likes to expend energy warming up all the stuff you digest (not unlike my Aunt Gert).
Spin around in the office chair 50 plus times: No further explanation needed.
Attaching a child seat to your car: Didn’t realize those things weigh up to 40 lbs.