Kitten Killers @ Underbelly

There are times when you won't want to laugh during this show but, unless you have the requisite willpower, you probably will. Be warned: if you have social aspirations or cultivated taste then give this show a wide berth. If you be prudish, do not enter. If you are the parent of any of the performers do not surprise your daughter with a visit. If male, attend only if you could tolerate being trapped on a hen party bus equipped with a humongous dressing-up box.

Kitten Killers are a precocious all-female quartet enjoying their first Fringe. All singing and sketches, this is a scattergun approach to comedy and, as the lighting fades on and off with each little story, it has a kaleidoscopic feel. Ever fallen asleep after coffee? This show is like a caffeinated dream. Despite the near burlesque performance and lewd lyrics, it is sunny and lighthearted. That's not to say the only bite belongs to the cracker-eating contest: one sketch is quietly seething with women who dismiss feminism, and shows the Kitten Killers could pursue other directions.

Some material is weak (wearing shower caps and pretending to be sperm) and receives too polite a groan from the audience. Next year – for they will surely be back – they will need to focus on a more specific direction, expand material with potential, and jettison the rest.

They will be noticed for the finale, from which a long-running, bawdy stage musical could be built. As with some of the laughter, you really won't want to sing this in polite company, but might find that you are unable to stop yourself.