Lifecycle Songs

John Heath and I are going through California standards for grades 1-4, trying to figure out the most important points to turn into songs for this upcoming show. We know that many of you have already purchased this play, so it may seem strange that we're still trying to figure it out.

That seems to be the Bad Wolf Way.

Here's the list of song topics that John's proposed:
1) animals inhabit different environments, are adapted to them.
2) food chain: animals eat plants and other animals; predator/prey
3) sequential stages of life are different for different animals
4) predictability of life cycle: organisms produce offspring of their own
kind that in adult stage resemble adult parents and each other
5) extinction: past, present, future (diversity, mutual dependence)
6) metamorphosis: silk worms, frogs, butterflies
7) Plants: how the get nourishment (roots, leaves)
8) plants: connection between fruits and flowers and reproduction

What do you think? The grade level for this show is 1-4, but we're especially hoping it's useful for grades 1-2, since we don't write that much for the primary levels. We'd like to hear your comments.