The study aims to determine the status of organizing science activities for preschoolers aged 5-6 and teachers' views on improving science education quality for 5-6-year-olds in Vietnam. The research was undertaken on 150 preschool teachers working with 5-6 years old classes in 24 public preschools in 3 provinces, including Quang Binh, Quang Tri, and Thua Thien Hue. Mixed methods, including surveys, interviews with teachers, and observation of science discovery activities, were used. According to the study results, science education activities were regularly organized in the preschools with specific plans following the school-year curriculum and the national ECE framework of Vietnam. Teachers used various methods and forms for organizing scientific activities, but the classroom environment was dominant. The participation of family and society in science activities at preschools was limited. Teachers also highlight some measures to improve the quality of science education in preschools, including providing necessary facilities, equipment, toys for preschools and increasing modern teaching methods. The findings of this study provide necessary evidence on science education for preschool children in practical terms as the basis for further studies on solutions to improve the efficiency of science education for preschool children in Vietnam.