The Kids' Dash is a lot of fun. They run or walk approximately 150 meters in a loop near the Visitors' Center. While geared towards kids not ready for the One-Mile, anyone can join. Parents and older siblings are welcome.
When registering, you can choose the with race-shirt option ($15 on or before 10/30) or the free option (no race shirt). Though it is ok to just hop in without registering, kids who register (with or without race-shirt) will get a race bag as well as the same style of race number as the rest of the participants.
All the kids get a "golden" (plastic) finisher medal and a lot of cheers.