Well, this is a tough one.
My favorite is probably not the first one I wrote. "Stone Soup" has evolved so much over the years and has had a lot of input from multiple actor's and director's interpretations. I like "Stone Soup," and have enjoyed the various iterations of its development. It was the first show that featured my two youngest children when they were very young -- 5 and 6 years old. There will always be a fondness in my heart for "Stone Soup."
Over the years I have been fortunate to direct everyone of my sixteen Children's Musicals. In fact, none of them were actually written in a vacuum. All of them had a reason to be written and performed. Even the four classroom mini-musicals. They started out as a project for a company that provides reading materials to classrooms in Asia that teach English as a foreign language. They chose famous English language stories as a basis for teaching culture and heritage, as well as entertainment through reading. This company wanted songs to go along with their simplified reader's theater scripts. I was given permission to use the songs for my own purposes, as well. The five stories I wrote songs for were "Chicken Licken," "The Country Mouse and the City Mouse," "Dick Whittington and His Cat," "The Musicians of Bremen," and "Three Billy Goats Gruff."
The great thing about owning the rights to your own work is that you are not bound by any restrictions. Nearly every time I have personally directed one of these mini plays, I have had reason to modify the script and add new songs. If I had a particularly talented cast, I could add more colorful characters and give them more interesting songs to sing. That's how "The Tale of Chicken Licken" and "The Adventures of Dick Whittington" became full-length musicals. I will always love "Whittington." I feel like I wrote some of my best songs for some of my best characters in that one. I always knew that "Dick Whittington" had potential to become a feature length show because of its beginning as an Old English Pantomime. But I was surprised by "The Tale of Chicken Licken." I will have to say, that of all the shows I have done with and for 2nd graders, this has been received the best. The school kids loved it! I guess it was comic enough and very easy to understand. (I really think they loved the costumes the most.)
Well, I have currently been working again on one of the first shows I ever wrote. It started as a Summer Camp production for 8 young children. The first iteration of "The Boy Who Cried Wolf" was written for 5-7 year-olds. It had to be very simple. I was so surprised by reactions of that first audience. When the little sheep came on and danced their little dance and shook their little tails, the people were practically "rolling in the aisles" delighted because of the "cute" factor. But I felt sorry for the contrary boy. I felt that he was just misunderstood and should have had a song that told his side of the story. So a few years later, I revisited this show and expanded it to full length and gave the contrary boy his own song, "A View from the Highest Mountain." Of all the songs I have written for Children's Musicals, I think I am most pleased with this one. Who out there has never felt misunderstood or has yearned for a higher perspective? (Writing a pure "stand alone" song within the context of a musical is very difficult.)
So, if pressed, I would probably have to say that "Never Cry Wolf" is my all-time favorite of my shows. Don't get me wrong, I love each of these stories as if they were my own children. You simply don't pick favorites when you had to work so hard to bring them to life. But "Never Cry Wolf" holds the most great memories for me, probably because I have lived with it the longest.