 The best known researchers of the field were Peter and Iona Opie.The subject matter of childlore includes the traditions of children between the ages of about 6 and 15 such as games, riddles, rhymes, jokes, pranks, superstitions, magical practices, wit, lyrics, guile, epithets, nicknames, torments, parody, oral legislation, seasonal customs, tortures, obscenities, codes, etc.as well as individual activities such as solitary play, daydreaming, fantasies, imaginary friends and heroes, collections, scrapbooks, model worlds, comic reading, mass media interests, dramatizations, stories, art, etc.