William Wish Wellingtons is an animated BBC children's television series produced by Hibbert Ralph Entertainment, which was aired on BBC One from 25 October 1994 to 27 November 1995. It was narrated by Andrew Sachs.
Sweet William (S01E08)
After not wanting to eat his vegetables, William wishes for a world made of sweets. And then he eats so much of the sweets, that he bloats to the size of a boulder.