Different questionnaires will be used to find out how the participant's eczema is doing during the research study. An electronic diary, which looks like a cellular phone, will be used to collect the questionnaire information and other research study-related information. It will also be used to remind participants to take the test medicine each day and to fill out the questionnaires. Participants will also be asked to wear something on their wrist that looks like a children's wristwatch so we can know when they are scratching their skin because of their atopic dermatitis. Laboratory tests, physical examinations and vital signs (height, weight, temperature, blood pressure and heart rate) will be conducted before and during the research study to monitor your child's health. Participants will need to come to the clinic for research study visits and at other times during the research study, the research study doctor or nurse will call the participants to find out the participant is doing.