Lowly Worm is a Busytown resident and Huckle Cat's best friend/pet. He often stays with the Cat family as a house guest. Although he attends school with the Cat children, Lowly can also be seen in more adult situations, like driving a street sweeper or working in the operating room of the Busytown Hospital.
He was first appeared in Richard Scarry's What Do People Do All Day (early appearance only), Richard Scarry's The Early Bird and is mute in the basic educational Random House Home Video series, Richard Scarry's Best Videos Ever.
- He did not speak in Richard Scarry's Best Videos Ever until The Busy World of Richard Scarry and Busytown Mysteries.
- In The Busy World of Richard Scarry, he frequently breaks the fourth wall.
- Lowly announces every episode title of Busytown Mysteries.
- He wears a green Tyrolean hat, a brown or red shoe on the end of its tail, a blue and green tube on his body (intended to resemble a sleeveless shirt and one-legged trousers) and has a red bow tie.
- He rides in the apple that looks like a helicopter.
- His skin colors are dark, light or plain brown, pink, orange, peach or gray.
- On Arthur, another CINAR/Cookie Jar Group Production, in the episode "Attack of the Turbo Tibbles", when the Tibbles are flipping through the channels, they come across a parody of "The Busy World of Richard Scarry", which features a bat based on Huckle and a worm/bat based on Lowly.