This new childcare center in the growing Riedberg development of Frankfurt, Germany was designed as “a park in the Kindergarten” that encourages connections between interior and exterior space. The building’s U-shaped layout has two purposes: it frames a partially enclosed courtyard, and it acts as a protective element that sequesters the childcare center from the bustling city. The park doubles as a children’s play area and an outdoor classroom in the warmer months. Built to rigorous Passive House standards, the building features several sustainability measures, including a green roof and a high-performance insulated building façade.