A magazine programme for younger viewers. Introduced by Christopher Trace and Leila Williams. An Elephant's Drum, a story by Michael Diver, aged 10 with pictures by Tony Hart. The Three Worlds of Gulliver - An extract from the new film shown by courtesy of Columbia Pictures. Six by Four: 6: Gradients and high levels, a series in which Michael Humphries shows you how to make a better lay-out for your model railway.