Penelope K runs the Information Station, a place which contains all the answers to any question a child might have. To help her find the answers, Penelope is joined by her sock puppet, Squirm; Hank and Frank, two wise cracking fish; Trewey, the shadow rabbit, and music is provided by the Rubber Band. Penelope K explores a world of smells when she's asked why dogs sniff so much... smells of perfume, flowers, carrots and campfires. She learns that all smells are invisible, that sharks sniff out their dinner, that rabbits can smell exactly where they are and that every creature has its own distinctive smell. No wonder dogs sniff so much! Sniffing tells them about who they're with, where they are and where their dinner is.