A Montessori Pikler Triangle set is a set of sturdy, wooden climbing structures designed for toddlers and young children to develop gross motor skills, balance, and confidence through self-directed, imaginative play. Created by Hungarian pediatrician Emmi Pikler and popularized within the Montessori method, these sets allow children to learn at their own pace, providing a safe and stable environment for climbing, pulling, and exploring, which fosters independence and body awareness.