Took my step son to see Superworm and Zog at a cinema mini morning and he absolutely loved it, to the point were it's started a real love of the Julia Donaldson books. The animation is gorgeous, a stellar voice cast, yes this is aimed at young children but as said my 3 year old loved this mini film and at around 30 minutes it's just the right length for little ones.
Review of Superworm
