Want to know more about Jack and see him in action? The below youtube videos are good references. Note: they may contain spoilers.

Meet Jack Frost
-Official DreamWorks character promotion.

The Birth of Jack Frost

Snowballs and Fun Times

Why

I Had A Past?

Thundersnow-Definitely contains spoilers, but shows Jack creating some awesome ( Read more... )

Types of Pups That Can/Cannot See/Hear Jack Frost
List will be edited over time.

Key:No* = Cannot see/hear until belief is established ( Read more... )

Jack Frost here. ...Or not, which is why you're getting the machine. If you can hear me, leave a message.