Stand back in wonder as the brashest and boldest boy in Springfield makes the big time! First, Bart gets the big idea that he'll be rolling in the dough by going green. Then Nelson stands trial and the only thing that prevents him from going to jail is Bart's big mouth. After a field trip adventure under the circus big top and a scheme to get on the big screen, Bart plays big brother to Lisa and Maggie only to find himself in big trouble! Finally, Bart and Milhouse make a big racket while building a rocket and become a big threat to national security!