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These are quite nice, and considering that it's been a long time since you did any studio work, you certainly have a good memory. My favorite is the profile of mom & son looking at each other.
Children can be VERY difficult to photograph because those little smiles and expressions occur at random. Some people find remote triggers useful because (a) you don't have to hide behind the camera, and (b) it's easier to interact with the little ones.
It looks like he's got a little drool on his chin in the car shot. It's something to look out for in the future...along with chocolate and milk rings, cookie crumbs, nose crud, etc.. Thanks for posting these.