How tall can a small friend be to go floating?

I see that children around 7-8 years old can participate in drift activities under parental guidance, naturally depending on specific regulations at the scenic area, and generally there are detailed introductions available through ticket booking software.
I see that children around 7-8 years old can participate in tubing under their parents’ guidance, of course, it depends on the specific regulations of each scenic area; generally, ticket booking software has detailed introductions.