Sweden’s preschool curriculum promotes scientific literacy of young children, with a focus on natural sciences. But how can preschool children best gain an understanding of physical phenomena and basic chemical processes? Dr Clara Vidal Carulla (Gothenburg University) and Dr Karina Adbo (Linnaeus University) use cultural-historical theory to explore how abstract thinking can be developed in preschool children to support science education. The focus of their research is on sub-microscopic particles in chemistry, but the findings are useful for learners of all levels.