Noah came up with a little tune about his baby brother called "a theo-in-the-door" (think "farmer in the dale" melody). It's actually quite catchy.
Brief update on this little guy-
Theo is now, finally, starting to walk around.
He thinks he can talk and has no problem carrying on a conversation at length- usually involving a systematic pointing at all recognizable surrounding objects.
He's proven to be a fairly good eater, though rice pudding and pizza are his foods of choice. The moment he feels he's had enough, he throws all remaining food (like bowls of cheerios and plates of pasta), so you have to keep a close eye on him.
Reading "Goodnight Moon" and ,again, throwing things are his favorite pastimes.
As far as I can tell, his current goals seem to be to keeping up with the big brothers and finding out what the inside of the toilet feels like.
Oh, and Bowser is his best friend. (not sure the feeling is mutual)