This toy, for we must recall that it is a toy, really works! When would put on the ears, is actually meant resonance noises, so the heart of course but also small strokes fingers given the "receiver" consequently we must ensure the use of this toy with children who are tend to quickly enporter, because the noise can quickly become large enough to their little eardrum! But very good toy for use under supervision. Since he was my son loves to play doctor!
