Abstract: When talking about school-age children it is an age that has changed both physically and emotionally. It is appropriate that the caregiver prepare them for various kinds of support such as intellectual, psychological and social before adolescence and grow to the next quality adult. One of the obstacles to developing them physically, mental and emotional is fear. This fear is causing anxiety and strain among school-age children. However, they have both known and unknown causes of fear. Caused by fear are direct experience and self-imagination. Causes are related to the perception of information from various sources. Especially in today's society, Thailand 4.0 has changed and developed information and communication technology quite quickly. It facilitates access to information quickly and conveniently at all times. The consequences are both level and quantity of fear of school-age children that will increase. First aid if we can't resist the rapidly spreading nature of online media, all sectors including families, societies and the government, should focus and find ways to reduce the fear of school-age children as much as possible. They and the nation will be stronger.