The naughty fort can be said to be a new, very integrated children's park designed for the nature of children who like to drill, climb, slide, roll, shake, swing, jump, shake, etc. Naughty forts foster independent personality, physical exercise, and intellectual wisdom. It is not subject to site restrictions, either inside or outside the house or in an irregular location, which is arbitrary, non-dynamic, interactive and functional, and can be installed, simple to manage, non-dynamic equipment and maintenance facilities. Fortress materials consist mostly of engineering plastics, pvc skins, zinc plating steel piping, steel pipes, heavy cannon sponges, etc. The price of the fort in different programmes varies from $300 to $1,000 per square metre depending on material performance. Powerless means that the naughty fort can operate without any power installations, saves invisibility the cost of operating, while at the same time providing for the safety of travellers is a welcome factor fo...