An expanding vocabulary

BJ, my happy little 21 month old,  is finally able to communicate with a lot of words.  His vocabulary includes:

Bye 

No

Eat 

Water

Milk

More

Bath

Please

Hat

Book

Bed

Uh-oh

The thing is, all exept for the last one are said with his hands not his mouth.  He's also able to get other things across by pointing and grunting.  I think he's developmentally on track, and he hears just fine.  He's just slow to speak.  I am working on more signs with him to improve our communication, and I'm sure he'll speak when he's good and ready.