Same as 8 months with these additions:
Animal sounds (especially cows, cats and chickens)
The book Moo, Baa, La La La
Old MacDonald song
Reading magazines (i.e. tearing pages, crinkling the paper and practicing turning the pages) 
Afternoon chocolate milk and cookies with Dad 
French Fries 
 For reading material he prefers the current events reading of magazines.
 Milk and cookies? Yes please.
 Always up for a good french fry.
Same as 8 months, especially the going to sleep part, with these additions:
Being imitated while whining (this results in being yelled at, a violent kick and fist shaking, not that I know from experience)
Being told "Uh uh uh..." when playing with Mom's phone and slyly trying to put it in his mouth (this results in him putting the phone down sharply and shaking his whole body while saying, "Nuhhh.")
The cold 
Our construction site (see above)
Clapping and saying "ehhh" (like Yay, but without the first y) 
Waving to people (arm making a right angle, hand extended with palm facing him, fingers open and close) while saying "Hey," which sounds like "Ey," in a raspy voice
Standing while holding on to the couch (not new, but moved up to intermediate skill level) 
 Taking standing to a whole new level
Using his index finger and thumb to pick up pasta
Stickers and how to detach them from the back of his hand
How to drink from the bottom of a sippy cup
How other babies are able to move with such elegance and grace, i.e. are able to move at all
Playing with Mom's phone: success, except for the not being allowed to put it in his mouth part
Stacking rings 
Mom's purse 
 Where Beast Boy is, the stacking rings are sure to be close by.
 Mom's purse provides minutes of fun for the 9 month old. There are mysteries inside like lip gloss, and sunglasses.
2nd haircut, courtesy of Mom (The first was last month, but since it wasn't previously mentioned, his second haircut counts as a first.)
Ride down a slide (BB's opinion: not awesome) 
 The slide was not as awesome as the other kids made it out to be. Such a disappointment.
Mickey Mouse 
 Mickey goes where he goes.
Jump Around (House of Pain), favorite jumping song
Get Lucky (Daft Punk), favorite morning song
Happy (Pharrell Williams), favorite clapping song
Close to You (The Carpenters), favorite love song
Baby Mine (Alison Krauss), favorite good night song
Weight: 22 lbs
Height: 30 inches