John,
I think its great you're helping your daughter get into doing photography at such a young age! You should post some photos she has taken.
My son was three years old when he started showing interest in what I was doing. I started buying him Fuji Quicksnap single-use cameras, and he quickly learned how to use them, even turning on the flash when needed. I soon after got him the Canon SureShot Owl, a 35mm point-n-shoot camera, which he is using in the photo above, taken when he was four. He later got a digital point-n-shoot and I later gave him a Nikon digital SLR.
He never got into doing photography seriously like me; he uses photography for other things like documenting things he builds with Lego bricks. He did end up following in my footsteps as a professional artist, though! He does 3D modeled illustrations of spacecraft for aerospace companies. He's making very good money doing it; though it doesn't take up a lot of his time, he has made more money this year from illustration work than his fulltime job as a software engineer pays him.
He did these for a company called Nanoracks
This is one of many that he has made for nasaspaceflight.com