When choosing large non-powered amusement facilities for theme parks, we need to consider multiple aspects to ensure that the facilities can attract tourists, ensure safety, and fit in with the theme of the amusement park.

First of all, safety is the primary principle for choosing non-powered amusement facilities. Since non-powered facilities mainly rely on the power of tourists to play, their design and manufacturing must strictly comply with safety standards. We should choose products that have been certified by relevant national institutions, such as ISO9001 quality management system certification, ISO14001 environmental management system certification, etc. At the same time, check whether the structure of the facility is stable, whether the load-bearing capacity meets the requirements, and whether it is equipped with complete safety protection measures, such as handrails, guardrails, protective nets, etc. In addition, the material of the equipment should also consider its weather resistance, durability and safety, such as stainless steel, wood or synthetic materials that meet safety standards.

Secondly, the fit between the facility and the theme of the amusement park is also key. Theme parks are often based on specific themes, so the selected amusement facilities should be closely linked to the theme to enhance the immersion and experience of tourists. For example, if the theme of the amusement park is forest adventure, you can choose facilities that combine natural landscapes such as jungle crossing, zip lines, and rock climbing; if the theme is space exploration, you can choose facilities full of technology such as space walks and interstellar slides.

Furthermore, the fun and interactivity of the facilities cannot be ignored. Non-powered amusement facilities should be able to stimulate tourists' enthusiasm for participation and desire to explore, and provide a rich and diverse gaming experience. For example, some challenging levels or tasks can be set up to allow tourists to feel a sense of accomplishment and fun in the challenge; or some facilities that require multi-person collaboration can be designed to enhance interaction and communication between tourists.

At the same time, we also need to consider the economy and maintainability of the facilities. When choosing facilities, we should not only pay attention to their purchase cost, but also their operating cost and maintenance cost. Choosing facilities that are cost-effective and easy to maintain and maintain can reduce the operating cost of the amusement park and extend the service life of the facilities.

Finally, we also need to pay attention to the latest developments and development trends in the amusement facility industry. With the advancement of technology and the changing entertainment needs of people, amusement facilities are constantly being updated. We should choose those facilities that are innovative and forward-looking to attract more tourists and maintain the competitiveness of the amusement park.

In summary, the selection of large non-powered amusement facilities for theme parks requires comprehensive consideration of safety, theme fit, fun and interactivity, economy and maintainability, and industry development trends. Only in this way can we ensure that the selected facilities can not only meet the needs of tourists, but also bring good economic and social benefits to the amusement park.