Above them, in ten successive layers of dormitory, the little boys and girls who were still young enough to need an afternoon sleep were as busy as every one else, though they did not know it, listening unconsciously to hypnopaedic lessons in hygiene and sociability, in class-consciousness and the toddler's love-life. Above these again were the playrooms where, the weather having turned to rain, nine hundred older children were amusing themselves with bricks and clay modelling, hunt-the-zipper, and erotic play.