I've been working with Isaiah to try to do a few specific new things, and at last he decided he was ready. Here's Isaiah doing something all by himself! (it's only about 5 seconds, so maybe it won't take too long to load, WN--we love you!)
In case it's not as clear to you as it is to me, since I was there and taking the video, what Isaiah's doing is holding himself in place until he's ready, and then he pushes himself down the slide. The arm you see is simply my friend, Oksana keeping him in place so I would have time to run around to the top of the slide in order to take the video.