My granddaughter is 11 1/2 years old does she still have to prove to them she is Covid negative I know it says 12 and older but really how do they check

They will do tests there if it is necessary.

No she doesn't

Not entirely sure. You might want to call them to verify. Could also depend on the personnel as my kids are 10 and 8 and I guess they could tell because they didn't ask about their status as we entered the vicinity and went through the check stations.

I'm not sure but when I went they did nothing like that

Vaccine status/card being checked.

They will check. Very safe minded.

They need proof of vaccination. Basically your vax card. There is a rapid testing station two doors down, if the child really needs one. Takes 10 mins.