Animated (NON-ANIME) US based movie about a rebellious boy, his father's time machine and his sister.?

I saw a movie that I don't remember too much about but would love to see again. This rebellious boy keeps getting into trouble. He messes around with a time machine that his father is working on which doesn't work--except this time it did. It sent him into the past. He was in Arizona and lived near "Dinosaur rock" named after a rock that looked like a Dinosaur. Think he had a baseball mitt with him, or something. There had been a mysterious inscription or writing on the rock--which was explained in the movie that he actually made that inscription while he was in the past so his Mom would find it and know he was ok. Can NOT think of the name of this movie to save my life, and Google isn't helping much (actually NONE at all).