They know...

They did not question when I asked them to stop a minute and test something with me, camera in hand, while we were spending time at the campground.

They did not ask "why?" when I asked them to stand on the spot of sunlight on a hill of weeds.

They smiled nice then returned to riding their bikes after a brief look at back of my camera.

They have figured out its just easier to pause and smile as they know their mom enjoys photography and everyone is happier if they get to do what they love...  Smart Kiddos!