During my day, there is a lot of saying things like "No, Anna, don't sit on your sister" or "Anna, she's not a stuffed animal!" or "Red light, Anna! You can't do that to her!" which means I've been screeching "no" too many times and need a new phrase to remind Anna that Eliza can't be dragged here and there or picked up and dropped on the box of blocks. However I've noticed that two things are happening: Eliza is growing (albeit very slowly) and can not only withstand more physical activity with her sister, but is delighting in it. And Anna is noticing more that her sister is actually a real kid and not simply a big stuffed doll. More and more, there is mutual physical affection. And it's simply wonderful to watch.