Leo is so close to crawling. He can move around by a combination of scooting, getting on hands and knees, and turning in circles while sitting. I don't know how much deliberate intent there is behind his eventual destination, but he gets somewhere.
He appears to have forgotten how to laugh. When he is delighted, like when he's tickled, he does this kind of grunty coughing thing.
Uma and Kieran have made a pact to swap places at the breakfast (, lunch, and dinner) table so they both get to sit next to Leo.