Five-year-old Ruby Marshall from Lancaster was diagnosed with Pearson’s syndrome at just 11 months old. She met the Mouse from The Gruffalo during a visit to Blackpool’s Gruffalo & Friends Clubhouse. Ruby with Mouse from The Gruffalo (Image: Supplied)Pearson’s syndrome is a rare mitochondrial disorder. Mrs Marshall said: "Pearson’s syndrome is ridiculously rare and doesn’t have a great prognosis, there is no cure and little research around the condition. Jenn McDonough, general manager at the Gruffalo & Friends Clubhouse, said: "We want to make dreams come true for children and hopefully today we did exactly that!"