Child Safety Promotion and Injury Prevention Research Center (CSIP), the Faculty of Medicine Ramathibodi Hospital, Mahidol University, conducted research to develop children protection measures to reduce the risks and casualties from car accidents and drowning in children. The study showed that motorcycling fatalities in children was 600-700 cases per year due to not wearing helmets and lacking of adequate knowledge. The market research on helmet sizes found that the weight of the smallest one is almost 1 kilogram, which is appropriate for 7-8 years old children only. Later, the helmet manufacturers held the conference to design proper helmets for 2 years old children or above the passed the standards and quality assurance. Consequently, the manufacturers have distributed this design widely and conducted further research on wearing helmets. The research found that the rate of wearing helmet while riding was not satisfying with a slight change in human behaviors. So, the promoting campaign on wearing helmet has been raising intensively. This research indicated that all accident studies must produce the protection guideline, change human behaviors, and affect various aspects. If the outcome policies are not successfully applied, other related research should show the results of the policy application approved by the Ministry of Public Health to develop further policies.