we just bought our 10 yr old daughter a freestyle 300 and she loves it. They are a bit pricey but will last her a long time and then go down to the younger boy, he has the kitty cat now. No good in snow. Lots of 550f in the mountains
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We rode a bit with this kid in Golden he was 9 yrs old on a mod. I also seen him go a$$ over tea kettle on it once , but for the most part he handled it ok.