Best option is to go to a local race, and find one of the track champions or their father that would be willing to help your child. Usually, you can find someone willing to work with your kid for next to nothing, maybe you offer to pay their next week race fees.
Many of these people have tracks at their house. This gives your child the chance to learn how to ride, without other riders on the track. Or they may have a large enough area to just start with figure 8's.
I may even be able to find people up in the Seattle area that could help. We race with people from the greater Seattle area. Send me another message if you have more questions.