If you're not familiar with these, visit with a track team yourself, practice with them and learn the skills to teach your kids or better yet, invite members of the high school track team to demonstrate and work with your kids. Invite the high school kids back to demonstrate and teach your kids how to 'pass off a baton' for relay races. Use makeshift batons. Let kids create running games at home. Listen to their ideas and choose some to incorporate in your sessions.
Kids can create some of the materials for running games in the classroom.
Integrate Academics Capitalize on kids' natural love for running to help them learn academics. The tie-ins are endless. Even if you are not a teacher, you can probably use at least one school bulletin board to put up a map and track your group's mileage across the country, thus integrating running and geography. Lots of schools have mini-competitions between classes to see which class can accumulate more miles each week. Or set a distance goal and see if you can reach it by a certain date.