•  Presentation should be short; 5 – 7 minutes MAXIMUM.  The boys do not want to miss all their recess time.
• Have a show-and-tell of what FUN, FUN, FUN they can have in Scouting.  Emphasize “boy” activities such as: archery, BB guns, camping, Pinewood Derby, building with wood, leatherworking, games, crafts, etc.  Bring poster or display board with pictures and bring props (derby cars, a bow (no arrows of course), derby trophy, neat example of a craft item, etc.) ….
• Tell them to bring their parents to JOIN SCOUTING NIGHT … TONIGHT ….. in the GYM (or wherever) …. At 7 o’clock (or whenever). Try this in the form of a cheer where they repeat it back to you several times:  What????   Where????  When????
• Give them a flyer, if allowed, and have them fold it like a sword (or an airplane …. Or anything else EASY).  That’s their very first Cub Scout craft.  Have them take it home and ….. put it in the refrigerator!  Why, because Cub Scouting is cool, of course!
• Have existing scouts wear uniforms to school that day so they are clearly identified as scouts and then get them to “talk it up!” ,,,, at lunch, at recess, on the bus. 

See further discussion below on other activities the day of JSN.