How long is it appropriate to play? How large is the entire park?

The appropriate time to play depends on personal interests, physical strength, and the size of the park. Generally speaking, if the park is not large, the play time can be controlled to 2-3 hours; if the park is larger, such as a theme park or a national park, it may take a whole day or even longer. As for the size of the park, this requires specific data to give an accurate description. For example, some large national parks such as the Grand Canyon National Park in the United States can cover thousands of square kilometers, while urban parks may only cover a few square kilometers. You can plan your visit based on the size of the specific park.