Bob Has a Blue Thumb (Bob Has an Idea)

Bob Has a Blue Thumb introduces young children to watersheds and non-point source pollution. The City People think storm drains lead to the sewer. Now, Bob’s Creek is polluted with trash, paint, and chemicals. Bob must figure out how his creek is getting polluted. Will Bob’s idea save the creek? Will The City People figure out they they are responsible for polluting Bob’s Creek?