On Wednesday, Stephen Colbert pointed out a hilarious fact about that Monster Trucks movie that hit cinemas in January: it was written with the help of (or at least inspired by an idea from) a 4-year-old. Naturally, the late-night host decided that he, too, could make a movie with the help of kids. This time, though, he enlisted a whole squad of little ones. The result is a "film" called Teenage War. It stars Idina Menzel and Andrew Garfield (with a few hilarious cameos to boot), and yes, there's a brilliant trailer in the video above.