I thought depending on how long this lesson was to go on, but if it was a week long thing or more, the final day could be a fairy tale day. Students could dress up as their favorite fairy tale character.
World Book Day costumes: cats, rats, hats – your pictures
-- BFG / BFG by Roald Dahl --These BFG ears a fantastic quick make to become the friendliest giant of them all! All you need is some felt and a headband, then finish off the look with a shirt, green trousers and a waistcoat if you have them.