Teachers of infants need a large bunch of key ideas and activities of all kinds to unlock in each child the treasures of loving kindness, thoughtful and eloquent use of language, intense active curiosity to learn, willingness to cooperate, and the deep desire to work hard to master new tasks. Teachers can tune in to each child's special personality--especially the child's temperament. There are three primary, mostly inborn, styles of temperament. Some babies are more low-key; they tend to be slow to warm up to new caregivers, new foods, and new surroundings. Others are more feisty and sometimes irritable. Easygoing babies are typically friendly, happy, accept new foods and caregivers without much fuss, and adapt fairly quickly and more flexibly after experiencing distress or sudden change. Here are some ideas that teachers can use during interactions with infants to optimize each child's development.