It's a cute movie for the family. The only "scary" part is with Diesel chasing down some of the trains with his claw, but my 3 year old handled it surprisingly well. He said that Diesel is a mean train, and that in the end he winds up in a ditch. It has some cute moral lessons about responsibility, families sticking together, and Peter Fonda is wonderful as the gruff, reluctant grandfather. The little girl is adorable, and all of the human characters are cute. My son had no trouble following the plot - and I welcomed a slightly complex plot from a kids' movie. Fine for 3 +.