00-Mom
Here we are at my all-time favorite parental hack. Moms and dads have to be all-seeing and all-knowing. We have to be aware that, when there is silence emanating from the playroom, something terrible is happening.

But sometimes we need a little help, like this mirror. You can see from up a floor and around a corner. Cue shocked squeaks of “how did you know we were eating the cookies?!”