From their website:
All seven Harry Potter books in seventy minutes!
Watch CBBC’s Dan and Jeff take on the ultimate challenge, with the help of endless costumes, brilliant songs, ridiculous props, and a generous helping of Hogwarts magic. This fantastically funny show features all your favourite characters, a special appearance from a very frightening fire-breathing dragon, and even a game of Quidditch involving the audience!
This brilliant show was first seen in 2006, and is playing an international tour in 2012. A must-see for Potter addicts, and a great introduction to the series for anyone who’s ever wondered what all the fuss is about.
And here's a very short clip from their show: