What age can you go alone? And how much does it cost for 13 year olds . And do we just bring the money or an id?

Cost for different ages are on website. Pay by cash or card. They didn't id anyone. Not sure if you can send kids alone but it did not take long to get through musuem

For three people (two adults and one child 12 years) was 57 dollars. I am not sure if tou can leave child alone. The Museum is small, you need only 45 minutes to visit. They accept credit card.

Just money