1 is a bit underexposed and extremely contrasty/high on the blacks level. The moment is adorable. The over cooking of the eyes is a bit on the creepy side.
Focus actually fell on mom's eyelashes and not baby's eye.
2. Those christmas lights are freaking me out with a baby putting them in the mouth. That's NOT safe and NOT something you should be allowing. Your shutter speed was at 1/40. That's too slow to hand hold for still life, let alone an active little one. Because the shutter speed is so slow you have a completely out of focus image. You had plenty of room in ISO to go up so that you did not have to use a shutter speed that low. Your exposure looks good here. Composition is dead center and tilted to our right making us want to tilt it back some. Definitely had easy placement for rule of thirds as she is looking off to our left. A little negative space there would have allowed for perfect placement for exposure, a feeling that she is looking to something and great balance.
3. The eye to our left is a bit over brightened and looks like it's bugging out of her head because of it. It's slightly warm on the color, but not horribly so. Exposure is good. The entire thing is out of focus again which is a result of the same settings the last one was with. She's placed nicely for composition again, you just needed to back out a bit and allow for a bit more open space in the direction she is looking.
Rule of thumb for shutter speed:
If it is still life no slower than 1/80 (some teach 1/50) to hand hold
If it is alive and sits still no slower than 1/125
If it is alive and wiggles no slower than1/250 (toddlers and moving children)
If it is alive and runs like the wind no slower than 1/500 (sports like basketball or football)
Your aperture is also at f/1.8 in these. That will make your depth of field so incredibly shallow that if you hadn't had the camera shake and movement to deal with, you would have had most of your subject out of focus anyway. On top of that the lens is NOT it's sharpest at f/1.8. It's actually pretty tough to shoot at f/1.8 and achieve GOOD focus. Bump up to a minimum of f/2.8 with that lens. You will still get the shallow depth of field and some nice bokeh, but your subject will be much sharper. Use an appropriate shutter speed and don't be afraid to raise your ISO to accommodate it.