The purpose of the outreach is to distribute pamphlets explaining that juries should not only judge the facts of the case but the merits of the law in question too. If they find the law objectionable they should acquit. Of course, judges often instruct juries to follow the law as they interpret it, but this is not correct.
As you can see in the videos a good time was had by all:
Earlier in their stay in Philadelphia Liberty on Tour's Adam Mueller and Pete Eyre had a run in with park rangers in, of all places, Independence Hall while filming "Is the Constitution Really So Great?" Incredible, not even in Independence Hall does the elected dictatorship that rules us allow freedom of speech!
Other coverage of their visit to Philadelphia:
Liberty on Tour enters Philly
Liberty on Tour 2010