If there are elderly people, you can go to splendid china in the morning and Shenzhen Museum in the afternoon, preferably Saturday afternoon. Old people should like to listen to cross talk. The crosstalk performance lasts about 1 hour and 30 minutes, and it is on the third floor of the museum. No tickets are available. You can go to Lianhuashan Park to see the night scene or Shenzhen Bay Park at night.