Beijing Aquarium is a large aquarium, located in Chaoyang Park, Chaoyang District, Beijing, where various rare animals and plants living in the ocean are exhibited. The expenses for visiting and spending in the museum are as follows:

1. Ticket cost: The ticket price of Beijing Aquarium varies according to different time periods and seasons, usually between 1 yuan and 2 yuan.

2. viewing area inside the aquarium: there are many theme areas in the viewing area, such as coral reef area, submarine tunnel area, Arctic ocean area, etc. Each theme area has unique exhibitions and performances, and there is no extra charge in the viewing area.

3. performance area inside the aquarium: there are several performance areas in the aquarium, such as dolphin performance area, sea lion performance area, etc. You need to pay extra for the performance, usually between 5 yuan and 1 yuan.

4. Food and beverage expenses: There are many restaurants and snack bars in the museum, which provide different flavors of food, with prices ranging from 1 yuan to 5 yuan.

5. Souvenirs and gift shops: There are many souvenir and gift shops in the museum, which sell all kinds of souvenirs and gifts related to marine animals and plants, with prices ranging from 1 yuan to 2 yuan.

Generally speaking, the cost of visiting Beijing Aquarium depends on the tourists' demand and budget, but usually it needs at least the budget of 2 yuan.