Difficulty of Shows

Hello, I am a director/Producer of the childrens theater program at a community theater. Over the last few years our program has grown significantly. We started a few years ago doing a non mti veruions of Pinnochio with 12 children and last year did Little Mermaid Jr with 50. We are thinking about beauty and the beast jr this year, but are expecting a extreamly large turnout. Going forward, we are toying with the idea of breaking our program into two separate shows, like 6-12 and 12-18. I know I saw on here before a post about which shows are more difficult and what would be better for young kids. Do you have a breakdown?