Wow, those are some bizarre images in those pics! And cute kids too! =) Some of them look pretty convincing. The first few are incredible, you can make out figures in them.
#13, I think "HoHo" likes your daughter.
#15, a vortex perhaps, or a fast moving... something.
#18, in front of the blinds behind the baby, I see someone in jeans and a flannel(?) shirt bent down toward the wall. Was someone really there? (according to pic #102, it is a real person? Looks transparent to me)
#20 is weird. It almost looks like a fog over the couch and pillow. Motion artifact perhaps? I have more to say later on in this post on the motion artifact-looking pics.
#36, I see a face in the mist, in the upper left corner of the picture.
#38, note the double-image of the doorknob. Looks like that "motion artifact" effect again.
#39, I got chills looking at this one! Creepy photo of a rather mean looking figure!
#41, I see 3 or 4 faces. I noticed the one in the upper right corner right away.
#43, looks like motion artifact effect to me, look at the sister's legs, they're blurry as if the camera moved. Also the daughter's head.
#45, re: your kids seeing dolphins, butterflies, etc. That's possibly the mind interpreting patterns in the mists that resemble these things. Much like seeing shapes in the clouds. Or maybe you have ghostly dolphins!? Never heard of such a thing before.
#55 - at first it looks like motion blur around the children, but I have some possible theories toward the end of this post... (if I remember to write it!) =) Oh, and there's a face behind the younger child!
#59 - ok this has to be a motion artifact or something, look at the reflection of the doorknob. Did you (or something) jerk the camera while the shutter was open?
#61 - "stuff wiggling in front of the camera?" I see motion blur in this one too, I wonder if the spirits are jerking the camera when you take these pics.
#62, motion blur effect again.
#63, this one is bizarre. There looks to be motion blur to the left of your daughter but nowhere else in the pic.
#65, I felt a chill when I saw that one. Looks like a figure with a hood or cloak. To the right I see something that almost looks like a woman wearing pink?
#75, creepy! Looks like a whitish-bluish face on the left.
#86, is that a figure in the lower center of the shot, or one of your children?
#101 (enhanced version of #55) I clearly see a (girl's) face behind the younger daughter!
Ok, techno-geek mode here for a second, on the pics that seem to show motion artifacts... on some (like #63) where the blur is just around one of the children, maybe the entity is somehow able to refract light like a lens and create a double image? On #59, it looks like the camera moved, or was moved, when the shutter was open. Look at the reflection of the doorknob, how it streaks up and to the left. The daughter and the items on the shelf to the right show the same blur in the same direction, as if the camera was jerked while the shutter was open. Did you feel anything touching you or the camera when you snapped the pic? Were you startled perhaps?
In any case, most of these pics are pretty convincing. Have you tried any other cameras, such as a film camera, to see if you get anything similar on it? You say it's cold in the room when you take these pics, which is a common indicator of paranormal activity.
KJP