The second time I went, although it was a fee, it was very worth it. There were 5~6 pavilions, and there were multiple projects in each pavilion. We read the guide and prepared dry food. We set off early in the morning and arrived at about 9:5, but there were already many parents with children in the queue. There are tickets available in the lobby on the first floor, tickets can be picked up by yourself, and tickets can be converted into QR codes. I heard a parent say that luggage can also be sent on the first floor. At that time, we didn't find that the backpack was heavy and suggested to store it. We brought a lot of dry food and played. The process is a burden. After picking up the ticket, queue up at the entrance of the 2nd floor. Paper tickets and QR codes are arranged in a pair. There are multiple halls (Experiment and Discovery Hall, Children's World, Mathematics Hall, Perceptual Thinking and Human Health, Green Hall, and Auto Hall, etc.), our goal is very clear. The first child's world, the child is very excited, trot all the way, This museum has water, machinery, music, general knowledge, etc. We stayed in this museum for 2 hours, and then went to the numbers, experiments and discoveries, and also watched some scientific performances, which was great, but I felt that the performance of electricity and magnetism could be deeper. Our children wake up early, feel sleepy at noon, and feel worried. They have to think about how to operate next time they go.