Every week there is a common theme running through the programme that the actors reflect upon during the episode; themes include Dinosaurs, Opposites, Zoo Animals, Food, Clothes, Games, Art, Hair, Hats, Shapes, Road Safety and vehicles. Each theme (or block of five episodes) were repeated twice a year on average for a period of six to seven years, before it was recycled and reused in new episodes. As funding was limited, only 45 new episodes were made each year, which means that nine weekly blocks shown each year were new episodes, the rest repeats.