Preschoolers are just fun. They know enough about life to enjoy it with enthusiasm and gusto, but not enough to survive very long without supervision. They are independent, but would never want to be left home alone. They live on praise and encouragement, but a single stern look can bring them to tears. They can be shy and timid one moment, yet confidently insist, "I can do it!" the next. They possess a ferocious appetite for play and order their lives according to the single principle that nothing is too difficult "for me." Play is their world and their tutor, taking them to the land of discovery that only ceases each night when they close their eyes in peaceful slumber. Above all else, a preschooler is a learner. His amazing powers of reasoning and discrimination are awakened through a world of play and imagination. Through home relationships, he learns about security, trust, and comfort; through friends he learns to measure himself against a world of peers;