Grimlins or Fairies?

I think someone's messing with me.

Two days ago, I found one of my kokeshi dolls - which are up high and behind a glass door - turned completely backwards. Couldn't have been one of the kids, but it sure wasn't me.

And now, I'm looking at my two kids' footprints which are in photo frames on my mantel, and Fifi's is upside down. Now, there is no way I've had her footprint in a frame upside down for a full year and a half without noticing it, but surely one wouldn't take it so far as to turn a picture upside down inside the frame... would they?

Either someone's being 'funny', or I've got Grimlins. Or bad fairies.