Don't know what a Bionicle is? Ask any 7-year-old. The biomechanical creatures of LEGO's colossally popular toy series come to life in a well-constructed CGI adventure. And even if you don't know Mata Nui (the great spirit and namesake of the Bionicles' island) from the Makuta (his Darth Vaderesque brother), you can still enjoy the awesome graphics and extreme lava-surfing scenes. EXTRAS Neophytes might want to open the ''Mata Nui Explorer'' interactive map for a handy guide to the characters and their villages, or choose the ''Wall of History'' option to see helpful pop-up video captions throughout the movie.