Kids have to be at least 54" tall to drive on the Road Course go cart track. That is 1 step above the Rookie Course. My 11 y.o. drove the Road Course and loved it. We saw kids younger than him driving and doing quite well. It is a lot of fun. It was my sons 1st time driving a go cart and he loved it.
Hope this helps. https://frankies.com/greenville/attractions/road-course/
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