It's a pretty two-dimensional movie with lots of overacting and exaggerated humor. There's lots of talk from Zurg about killing different characters and at the beginning he is "torturing" three of the little green men by giving them electric shocks, albeit in a funny way if you understand that it's supposed to be funny. My three year old clearly couldn't follow most of the plot and seemed a little upset when the robot guy was blown to pieces (though he's later reassembled). Even if he could follow it, it was not really a good movie.