Vaccination required for admittance to an all ages show. How does this work for a ten-year-old who is unable to get vaccinated?

vaccination is now mandatory, unless before purchasing ticket, it may show you can take a covid test 72 hours prior for example: Youtube Theater.

I went last Saturday and there was a kid in there. Best to just call them though.

They let them in. Took my 8 year old, went in, no problem

Sounds like a question you should call the venue about. When I was there recently kids around 10-12 were there