How tempting it is to slap those daring little hands! Many parents do it without thinking, but consider the consequences. Maria Montessori, one of the earliest opponents of slapping children's hands, believed that children's hands are tools for exploring, an extension of the child's natural curiosity. Slapping them sends a powerful negative message. Sensitive parents we have interviewed all agree that the hands should be off-limits for physical punishment. Research supports this idea. Psychologists studied a group of sixteen fourteen-month-olds playing with their mothers. When one group of toddlers tried to grab a forbidden object, they received a slap on the hand; the other group of toddlers did not receive physical punishment. In follow-up studies of these children seven months later, the punished babies were found to be less skilled at exploring their environment. Better to separate the child from the object or supervise his exploration and leave little hands unhurt.