For a site southeast of Jakarta, a young Indonesian couple asked eco-minded firm Atelier Riri to design a fun, contemporary home with designated spaces for their two kids to exercise their creativity. The project’s modest budget (approximately $55,000) led the architects to use shipping containers—a bold move given the region’s sweltering climate. “By concentrating on humidity and temperature control, we found economical ways to facilitate a comfortable environment inside a metal box,” says the firm’s founder, Novriansyah Yakub. His team crisscrossed four containers Lincoln Log-style and added shutters, windows, and sliding doors to create a cross-ventilation system. Layers of recycled pine, glass wool, and planter mesh on top of the containers further decrease temperature. Cost-effective elements continue inside the three-bedroom home, including custom wood furnishings and polished concrete floors. A roof garden equipped for rainwater harvesting connects to the residence’s crown jewel: a bright red game room, now chock-full of toys.