Louise, what sized camera are you using? Perhaps if you don't have a small one that you can conceal until right when you're ready to snap, you might try a little disposable one. That way you could keep it in your pocket until you're ready to get that picture.

Poor boy....mine are such hams that they don't even flinch when I get out the BIG camera!! I ought to keep a disposable one in each room of the house though to catch those perfect shots that always get ruined when I have to dig out the camera bag, etc. I've seen it done at wedding receptions, a camera on every table, maybe we should do the same thing in our homes!!!