Today is the day!
Actually, yesterday was the day. :) Josiah can roll over, front to back! He's also really close to rolling back to front. And today he is trying SO HARD to crawl. He can pull his knees up under him, but so far shoving just propels the legs backwards instead of the body forwards. Or sideways. Sometimes he turns himself in a circle.
Now I have to figure out how to make our house baby-safe in spite of two older boys who like to collect things like marbles.