My experience has been a little different from Martin's while photographing my kids over the years....and it may be partially my fault. Basically, I was always in their face with the camera (mainly canon DSLR's). They eventually grew to hate the site of a camera. They became completely uncooperative and would even go out of their way to sabotage the shot. So I backed off....way off. In fact, one year I basically only used a phone for little stuff. In late 2016 I went to a Sony APS-c body paired with the few small lenses in my sig. It's tiny, very inconspicuous, and quiet. I LOVE it!
Since getting the smaller kit I have started getting shots of my family again. I think it has more to do with my approach. I first try to imagine the shot in my head. I then sneak in with my small camera and dial in the settings. Then politely ask whoever if they'd mind a quick shot or two....no more than that. Gone are the days of taking 20 shots trying to get the perfect shot. I try to get the shot and be done. Don't subject them to too much photo nonsense. Combined with backing off for a while and letting things settle down, this approach seems to be much better tolerated. Now I can even get them to sit for a proper portrait every once in a while!
That's just been my experience. I think I was too paparazzi like for too many years. I'm now much more stealth in my action and gear. Seems too be better for everyone.
sounds familiar...my daughter was all about her picture taken until just after she turned 2...and I took a lot...then she started to be less than cooperative, and between 3 and 5, she was downright mean about ruining the photos...to the point that I don't have many pictures those two years...the a9 is great, its super quiet, small enough...and I am looking at getting the cheap 35 f2 lens to use with it...