It asks on use.

Use guide

★Prohibited matter.
◇There is no smoking in the museum.
◇Please be careful in the museum - no running!
◇Please keep close watch over young children.
◇No eating or drinking except in designated areas.
◇There are escalators to take you up to the fifth floor,but you will have to use the stairs to go down through the exhibit areas.
◇In case of emergency,please follow all instructions of the museum staff.