Until 21 August 2005. Kids can discover the magical world of animation at this very special exhibition. Coinciding with the premiere of the film El Sueno de una noche de San Juan, the Casa de Vacas del Parque del Retiro is organising the exhibition Oniria: Atrevete a sonar. Beyond gaining an insight into the secrets of the world of animation and the work of cartoonists, illustrators, scriptwriters and animators, kids can enjoy games specially devised by the expert organisers. Participants play interactive computer games, put into practice what they learn in painting workshops, have photographs taken with their favourite characters and even make their own small film montage based on the characters in El Sueno de una noche de San Juan'.