Opening an indoor playground requires careful planning, especially when it comes to space. The size of your building depends on factors like equipment type, age groups, layout, supporting facilities, and future expansion. Soft play areas may only need 1,000–2,500 sq ft, while trampoline parks or ninja courses require 3,000–5,000 sq ft. Large family entertainment centers can range from 10,000 to 40,000 sq ft. Safety is key, with adequate buffers and proper flooring essential. By balancing equipment, space, and flexibility, you can create a safe, engaging, and scalable indoor playground that grows with your business.