Now that Ollie can sit well and not fall over every 30 seconds, I decided to give him a bath and let him sit up. Previously I laid him down in the tub and he screamed almost the entire time.
I think it is pretty obvious that sitting up and playing with tub toys made all the difference in the world. Ollie was beyond happy playing and even let me wash his hair without crying or fussing at all.
I think he got annoyed with me trying to take his picture though. He kept looking at me like I was seriously wasting his time. Hooray for babies that love the tub!