A live-action puppet show, Li'l Horrors followed the misadventures of the students at a school run by Morbidda Bates, a retired horror-film actress. The students included examples of key monsters from horror films: vampires, Frankenstein's monster, gorgons, mummies, zombies, werewolves, and swamp creatures.
According to December Films' press release for the series:
Li'l Horrors is a children's puppet sitcom specifically produced for the 5-8 year old age group. This is an age group who are currently not well catered for. Much programming is made for pre-schoolers and for 9 year olds and above. Li'l Horrors is created for this in between age group. It does not talk down to its audience or aim over its head. It is, however, infused with enough wit and off-the-wall humour to engage an even wider audience. Aimed well at [its] target audience, it is modern, slick, sly, funny and irreverent.
The program also focuses strongly on difference, with each of the characters quite strongly physically different from one another, as well as widely different in behavious and characteristics.