Finn has started sitting up (and spitting up, for that matter). His balance isn’t great, yet, but he can sit for up to a minute or two if he really wants to. Then he falls over.
(Sorry the photos are a little fuzzy. Fast kid + low light + mom trying to catch kid = blurry photos)
Finn has joined the ranks of noted sitters such as Rigby and Diesel (although Finn won’t do it on demand yet. Not even for a treat).