It's the 21st century, but the gods of Mount Olympus and assorted monsters have walked out of the pages of high school student Percy Jackson's Greek mythology texts and into his life. And they're not happy: Zeus' lightning bolt has been stolen, and Percy is the prime suspect. Even more troubling is the sudden disappearance of Percy's mother. As Percy adapts to his newly discovered status as a demi-god (his father is Poseidon), he finds himself caught between the battling titans of Mt. Olympus. He and his friends embark on a cross-country adventure to catch the true lightning thief, save Percy's mom, and unravel a mystery more powerful than the gods themselves.
This was a fun watch. Is it a "great" movie or a well done movie? Not necessarily. Its a simple, fun watch. You can tell that it was the same director as the first Harry Potter movie because I felt the same way watching this as I did watching that. Another appropriate comparison would be Night At The Museum. Its the same kind of effects with historical (Greek mythology) references throughout the movie that actually make it educational at certain points. I had read the book and although they changed a lot of stuff, it was still lots of fun to watch. Are you getting my emphasis on its level of fun? Good. Just don't overanalyze it and enjoy it for what it is instead.
I would recommend this movie for people to check out. Its got good action, good character development, an easily followable story line even though its somewhat complicated material and kids and adults are sure to have fun watching it.