Dr. Ross Jennings is forced to face his childhood fear of spiders when he moves to a small town where an unusual spider is harming several of the townspeople.

Diary of a spider: This spider is a lot like a normal kid--he goes to gym class and has Grandparents Day at school. But he also gets to spin sticky webs, take wind-catching lessons, and have a fly as a best friend! Roberto the insect architect: Roberto the termite travels to the big city to follow his dream of becoming a successful architect. Norman the doorman: Norman, the guard of the Art Museum, is surprised when his sculpture wins first prize...

In these episodes from the hit animated series, the Cat in the Hat leads Nick and Sally on journeys of discovery in which they learn about the world's littlest creatures, such as earthworms helping the environment, spiders spinning their webs, limpits holding on tightly, fireflies lighting their world and microscopic protozoa in a dew drop.

Kids explore the musical mysteries of sound during a spooky trip to the haunted house. In the next episode they learn about nocturnal creatures and finally they discover the ingenious hunting skills of spiders.