I happen to think that hands-on learning for the younger years is the best way to go. As a result, we are learning about creepy crawlies with actual creepy crawlies.
I purchased some earthworms from a bait vending machine. They were all still alive and quickly wiggled into their home. We had set up a terrarium filled with ripped paper, old food, and dirt. Today we just explored how the earthworms were settling in as well as learning a little about the parts of an earthworm. We turned over some dirt and paper to watch the worms wiggle away.
We have many experiments ahead of us with these little guys. Creepy Crawlies and the Scientific Method: More Than 100 Hands-On Science Experiments for Children is our guide to exploring the scientific method by doing harmless experiments.