My suggestion for the courtyard space between the building and the sports field, which the children used during the break, consisted of an acoustic measure that could also be used as a break clock. Every hour on the hour (technically realized by many small miniature loudspeakers mounted on a bridle and connected in series) a train was to arrive - with squeaking brakes, rattling doors, but without stopping; alternating with other events, e.g. an alarm or an announcement. The children could have danced in the courtyard to the music or listened to a fairy tale read by a carer and broadcast via loudspeakers.