This weekend David and I went and saw Mr. Peabody and Sherman, which is a heart warming tale of a dog and his boy. The movie was really cute and highlighted the relationship between Peabody and Sherman, but it would not be Peabody and Sherman without time travel. The whole idea of inventing a time machine (called the Way Back) to teach your son about history is fascinating. The time travel that they show in the movie is great in mine opinion and they went to more than one location, which is part of what made it so interesting.
There are a few interesting things about how they decided to look at time travel in this movie. One, is that the things they do in the past seems to not affect the timeline and even seems to be incorporated into how history occurred. Next, is that they only travel to the past and back to their own time. They seem to be only able to move through the past and not into the future. Finally, the one big rule of time travel is that you do not cross your own time stream, which leads to interesting consequences. (Spoilers for Mr. Peabody and Sherman after the jump)