Adapted from Andy Griffiths' and Terry Denton's phenomenally successful Treehouse book series, Richard Tulloch's play - The 13-Storey Treehouse - is action-packed, full of laughs...with a see-through swimming pool, a tank full of man-eating sharks and a lemonade fountain Imagine living in a 13-storey treehouse that includes a secret underground laboratory, self-making beds, a vegetable vaporiser and a marshmallow machine that shoots marshmallows...