People often say that children are the most beautiful existence and symbolize hope, and children also need to be educated and cultivated from an early age. Children are innocent, lively, and full of curiosity about everything. Therefore, the interior design should not only cater to children’s curiosity and innocence but also give them corresponding educational significance. The Waldorf Academy Toronto Preschool‘s project was inspired by the ray of sunlight in the forest. According to children’s characteristics of being curious, active, and good at imitating, create an ecological environment, and give play to the function of environmental education.