This award-winning BBC series uses Makaton sign language and was carefully designed for children with learning difficulties - but it has also proved incredibly popular with many other pre-school viewers. Justin and his young friends set off on eight exciting new quests including some special Christmas fun, a birthday party as well as a visit to a cafe. And, of course, there's always time for everyone's favourite... Mr Tumble - not to mention Lord Tumble, Grandad Tumble and Aunt Polly.