We offer small-group online courses for curious kids. We want our students to experience what it’s actually like to be a mathematician. In each course, we work alongside the students as equals, noticing patterns, formulating conjectures and proving theorems. We stumble upon questions a child can answer and questions that no one in human history has been able to answer. And we follow students' ideas as deeply as they wish to explore them, even if it leads to the study of research-level mathematics.