This is the story of two very imaginative little boys and their resistance to cleaning up their toys. Two little boys are about to go out for the day to the swimming pool as a treat. But before they can go, they must tidy up all their toys - which are all over the house - as requested by their Mummy. The boys consider this a mission! The boys attempt to clean up their toys in various parts of the house while making all sorts of excuses to Mummy to leave the toys where they are. The boys are easily side-tracked when attempting to clean up each room, as they find themselves playing with their toys again, their imaginations taking over. They find themselves driving trains, defending castles from ogres, climbing high mountains, flying spaceships, catching sea serpents and meeting prehistoric dinosaurs. All while trying to clean up their toys! Written by Jason Tucker and stunningly illustrated by Nick Roberts, Operation Clean Up Day is a fantastic journey through the imagination of two children, who can turn a simple set of toys into an entire fantasy world, whilst teaching children the valuable lesson of tidying up their toys after playtime!