This paper undertakes an investigation of the "life" of the curriculum concept of "children's interests" in a preschool practice. The concept of "children's interests" plays a vital role in the Swedish preschool curriculum text and in the preschool field. Strongly inspired by Actor-network theory readings, the paper aims at producing accounts making visible the making of the concept of "children's interests" through relations among children, carpets, Minecraft figures, boxes, teachers and schedules in a preschool practice. The paper engages in ethnographic materials generated at a Stockholm preschool over a period of 10 months.