If you were under the impression that the Scottish islands were formed by glaciers during the ice age, then think again. They're actually the humps and bumps of an ancient monster who curled his way around Scotland. Or at least that's what we're told in Misterstourworm, an exciting story re-worked from legend by Stuart Paterson.

Having been released on CD and set to a dramatic score by composer Savourna Stevenson, the tale has now been turned into a Fringe show. Stevenson's music forms the backdrop, while two storytellers act out the tale of a fearless hero, mythical kelpie (water horse) and the eponymous scary monster. But rather than try and replicate the beast onstage, the show takes a more creative approach.

'It's a piece of super-charged storytelling,' says Paterson. 'Staged in a simple but inventive way using giant chairs and sheets. And I think that way you've got a much better chance of creating the story in a child's imagination.' (Kelly Apter)

Musical Theatre @ George Square Theatre, 662 8740, 12?25 Aug, 10.30am, £6.50 (£5.50).