We netflixed Aliens in the Attic and watched it with the kiddies. My 7 and 5 year old were a little scared for 5 or 10 minutes of the first half hour, but after that my 7 year old decided it was more funny than scary and enjoyed the rest of the movie. My 5 year old never got over it. My 3 year old never cared, she just watched.
I have to say it made me laugh. A lot. There's a character introduced in the late beginning that made me worry where the story might be going. At the least, I thought he would bring the movie down a couple notches for me. Was I ever wrong! He was very funny- especially his physical comedy. Very talented.
Check it out, especially if you are a or have pre-teen boys.