Good to know there's a season for such things. That's the beauty of magic, you don't always have to wait.
Because they're tiny and demanding little beings who interfere? Not my opionion but I've heard it said. Personally if someone can't stand my kids, that end sup being their problem. I'm glad you don't mind though.
A children's theatre would be great for the kids. But definitely very demanding. If she ever wants to pursue it though, talking to people like Viktor Krum and Genevieve Vipond would be a good idea. Viktor started the little quidditch league and Genevieve runs it now, so they would have the proper connections to help start something. They might at least have some ideas of where to start. I probably even know some people who would throw money at it. I do enjoy going to the theatre, but I could definitely never perform unless it's dueling, which is more... freeform in a fashion, and also in earnest for me.