The man in the yellow hat lets George get away with more than he should. He may be a monkey but he does need parenting. I think kids watching this who are older might think they can do what George does and it'd be fine. My 2.5 year old loves it though and will watch it over and over. I also do love the music and it's mom and kid friendly.
My 4 year old thought that the "bad" guy who chases after George and The Man with the Yellow Hat was scary. Overall this was a nice film, it fit in well with the Curious George TV series.
Since my daughter was 2 she has watched Curious George and loved him. This was all she could talk about wanting to see. She laughed the whole time at the elephant and she wanted George to help her get home to her family.