The Pearson family takes a vacation and rents a house. It doesn't take long for the kids, led by Tom Pearson, to find aliens in the attic. It turns out that they are just an advance team for a larger invasion. One of their weapons is a dart that, when shot at, and stuck in someone, allows them to control the person; but it only works on adults. This becomes a key element in the story. Video gamers will appreciate it even more. One thing that adds to the humor is that the adults are clueless as to what is happening.
The casting is very good good. SNL fans will appreciate seeing Kevin Nealon and Tim Meadows (as the Sheriff). Andy Richter is good as Uncle Nate, and Doris Roberts is funny as 'Nana'. The most entertaining character is Ricky Dillman, who is the boyfriend of Tom's sister Bethany. He is a liar, and is older than he admitted. That fact turns out to be very useful when he is stuck with a dart :)
A very good movie. Lots of action, and very funny.
No content warnings. I took my nephews, ages 9 - 14 to see this, and there was nothing objectionable.