In the Developing Minds Lab at George Mason, Sabine Doebel says she has a dream job. As an undergraduate, she became fascinated by children’s thinking and how it changes with age. Now, as an assistant professor in the Department of Psychology, where she directs the Lab, she spends much of her time designing studies to understand how young children learn to think and act flexibly — that is, how they develop ‘executive function’ skills. Although these skills are vital to children’s success in school and beyond, much remains unknown about their development.