Scooter party... a park with a large area like a basketball court, make a obstacle course using traffic cones and handmade street signs out of cardboard boxes with speed limit, school zone, turn ahead, and watch for pedestrians, etc...and colorful banners. Some games can be fastest through obstacle course, placing different safety items throughout course and having the kids put them on as they go through the course.   What are foods that skaters eat? PIZZA and soda. Easy to order, delivered FREE and all you need is plates, napkins and cups for juice/soda.  Semi-pro skaters can be hired for reasonable fees to host safety demos, safe tricks for children present. A Polaroid picture with each child and semi-pro skater and his autograph makes a lasting memory for each child. Skate parks throughout the U.S. can help you find one. goodie bags can consist of appropriate stickers for each child to decorate their scooters...(Tony Hawk emblems, skating emblems), water bottles (always thirsty after a ride), kudos bars or energy bars, and  first place ribbons, and depending on your budget an admission ticket to a skate park.