Vocabulary of a 17 month old

So Thomas has always been a good communicator by letting you know exactly what he wants.

Normally this communication is in the form of pointing, shaking his head yes/no, or just making sounds until someone eventually figures out what he wants.

However, over the past few days he is beginning to use his words more by attempting different sounds.

This morning when Grandpa came over to look at our heat ( which apparently is not working) Thomas shouted "pa"!