You Don’t Want to See This, Daddy
To the moms and dads out there planning on getting nanny cams, never ever tell your children how they work. If they know how to turn it on, they know darn well how to turn it off. And whenever they turn it off, we guarantee that your toddlers are doing something they’re not supposed to be doing.
The OP didn’t provide details, but we know that whenever their three-year-old shut off the nanny cam, all heck was going to break loose. The worst part is that the parents could probably never find out what it was unless there was physical evidence of their misdeeds, which we promise you there definitely was.