Just about all of them... some need to ride with an adult.
The system is based on height, rather than age. And the website has a nice list of all rides sorted by the height requirements.
Kids above 44" can ride alone. Below that with adults
All rides.. It's not based on age.. it's based on height.. if the height is 43inches (48-50 for some) they can ride on their own.. else with an adult
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