... before you can do those things you want to do. You are lucky to get some time to yourself. One child is sleeping and the other one(s) is(are) well occupied. All you want is 30 minutes to yourself to do whatever.
But, on your way to do that you have to: pee, put this away, pick that up, replace this, flick that off, turn that down, fill this up, straighten that, prepare those, turn this over, gather that up, put that in there, move this from here, take that off, find the other one, change this, save that, print those, test this, mail that, kick that out of the way, flush this, wipe that up, stuff those in there, quick throw that away, restore this, switch that, figure out where you saw it last and make sure there's enough of this, that and the other.
Where the hell did my 30 minutes go? And I still have to pee!