Kate enjoys holding her sisters and "helping" them learn to roll over. I wasn't here for the first episode of Kate's training exercises.
Step 1: Stretch out the legs
Step 2: Grab the front of your sister's shirt
Step 3: Pull and Flip
Neither Abigail or Eveline seem to mind and don't cry at all when she does it. This is always supervised very closely by daddy and I have been keeping an extra close eye on her to make sure she doesn't try to help them stand up or anything.