woah, you have either a white balance problem or a color profile problem on those first two images. Looks like a white balance issue but it's hard to tell because the embedded EXIF thumbnail looks okay.
you have the flash, go ahead and slap it on the camera and point it over your shoulder to see what happens. Also, zoom in. It will mean the flash is farther away from your kid that might help. I would be using the 70-200 II for dang near every shot i could. The 24-105 is no good for close portraits under 50mm and besides, you have the Sig 35 for that.
cute little bugger.
PSA: The above post may contain sarcasm, reply at your own risk | Not in gear database: Auto Sears 50mm 2.0 / 3x CL-360, Nikon SB-28, SunPak auto 322 D, Minolta 20