(2 of 2)
Looking for other ways to stimulate the learning process of babies, Ertel's team designed a Plexiglas crib. Here, too, according to the institute, the results were remarkable. The 38 infants who were raised in the transparent cribs were better able to see what was going on around them and to interact with it. Their mental development was remarkably faster than that of a control group. At 18 months, children in the experimental group were measurably more intelligent than two-year-olds who had been confined to traditional cribs.