We did a mini unit on life cycles these past few weeks. Our duck eggs are now in the incubator and the countdown is on. The kids are thrilled! One of my favorite art lessons is this butterfly life cycle watercolor. You'll need to purchase 3 types of noodles and some rice, but it will last you for years. I like using craft paint, but I'm sure tempra works just fine. The noodles and rice will all hold with Elmers glue, but I use a hot glue gun for the "butterfly". It is a bit heavier and doesn't seem to hold well otherwise. I do a directed drawing with oil pastels (crayons work fine as well). The background shown is of warm colors, but it is also beautiful using cool colors.
You can find this and other activities in my mini unit of