Where to start...
Let's start with The Dinosaur Musical.
It's an original story, by the Reale brothers. Willie writes the book and lyrics, Rob writes the music. Basically, several years after a truce is made between carnivore and herbivore dinos in an effort to preserve both types of animals, a couple of Tyranosaurus Rexi (the plural, I hope) convince their new and naive king, Quincy, to break the truce. They are met with resistance from a group called The Resistance, an alliance of herbivores and some carnivores, who liked how things were going with the truce. In a sub-plot, Eleanor and Mindy, the teen-aged daughters of a Resistance T. Rex and a lovely Parasaurolophus chanteuse named Reginald and Carlotta (respectively), plot to bring their parents together romantically.
Does the show work? Yeah, for the most part. The target audiences are kids aged five and up, and their parents. There is singing and dancing, satire mixed in with some tender moments (Quincy's wish that his father, King Marcus, wouldn't die is given an entire Ashman/Menkin wish song). The book drags a bit in spots, and could use some more work, but the target audience enjoyed the show. (Good lighting and other special effects helped, of course.)
Four of the thirteen characters die (one by natural causes) in the course of the show, nothing too morbid or lingered over. The deaths didn't seem to bother any of the kids watching. Guess they're more resilient than their parents credit them to be.
Casting? Two juveniles as the young girls, three other females (two doubling in roles), four men (again, two of them doubling). Yes, TCB, you could easily play King Marcus, and could probably also handle the doubled role of Swifty Levine, a triceratops direct from the Borscht Belt.