Discipline and Words

I've had to put Caleb in the "time out" corner three times today. He knows not to chuck the hard wooden puzzle pieces at me or the dog but today it was too hard for him to resist. I sat him in the corner for one minute each time and he cried his little eyes out, saying "mama" the whole time. It's so hard for me to listen to him be so sad. But very necessary. I explained to him why we don't throw the puzzle pieces but that it's okay to throw the ball. After the third time in the corner he understood. He is so smart. It amazes me what he understands. I can say almost anything and he knows what I'm saying. His vocabulary is really good too. His new word is "up" and he uses it appropriately most of the time but sometimes he says "up" when he really means "down".

He says the following words:
mama
dada
dog (duhg)
woof
cat (daaaat)
duck (duhh)
quack
ball
please (ease)
sit
bath (baaaa)
juice (he says it perfectly!)
yes (dah, with a nod)
no
shoes (shooos)
banana (bana or baaaaaaaaa)
fish (ish)
wow!
uh-oh
up
down (don)

He signs the words "more", "please", "milk" and "all done". Teaching him sign language has been soooo helpful for him and for me. He is able to tell me when he's hungry (which is all the time!) and it cuts back so much on the frustration for both of us. It was easy to teach him since he'll do anything for food. It's so cute when he says/signs "please". How could I say no to such good manners? :)