This youth adventure film from New Zealand is an adaptation of a 27-year-old NZ TV series, which is in turn based on a book. The redheads you see above play twins named Rachel and Theo (Sophie McBride and Tom Cameron) who have special powers. Sam Neill plays a mysterious old man called Mr. Jones who helps them learn how to use those powers. They then fight off aliens underneath the inactive volcanoes of Auckland. Getting too much more in-depth than that would be a waste of time. The story is simple and straightforward, and is thankfully less focused on how they can sell toys tied in with the movie than American films of the same general stripe. Some sexual situations may not make the US edit should it get picked up, but they're far from crucial to the story.
Director Jonathan King directed the hilarious and fresh Black Sheep a few years ago, and his chops still rate. All concerned do a better job than things like the remake of The Race to Witch Mountain did for even its most ardent fans.