Take children to visit the Geological Museum of China, in addition to those attractive gemstones, the second attraction is these fossils from hundreds of millions of years ago. It's really magical to be able to watch and even touch it up so close. They just lay quietly in the mud, turned into fossils, and then discovered by modern people hundreds of millions of years later...
After visiting, I also want to complain about it, as a national geological museum, although the building is quite large, the exhibition area is too old, and it has not changed in n years. Explanatory content is poorly inadequate. There are too few exhibits, too few fossil types, and they are not refined, really not enough to plug the gaps in the teeth, completely inconsistent with the pavilion of the national character. And this kind of museum that is originally for children to popularize science also requires 15 yuan tickets, which is really unreasonable.
I took some fossils and gave them a look.

trilobite
Era: Early Ordovician (485 million to 470 million years ago).
Origin: Yongshun, Hunan.
Ammonite.
Era: Devonian (405 million years ago – 350 million years ago)
Origin: Morocco
Yunnan Yunnan headworm
Era: Early Cambrian (about 542 million years ago – 485 million years ago)
Origin: Kunming, Yunnan.
Tron Kong Sea Lily
Era: Late Triassic (about 200 million years ago)
Origin: Guanling, Guizhou
Line ginkgo biloba
Era: Early Jurassic (c. 199.6 million to 145.5 million BC)
Origin: Guangyuan, Sichuan
Yixian light key fly
Era: Early Cretaceous (137 million – 65 million years)
Origin: Liaoning North Ticket
Swamp wild arrow fly
Scale wood
Era: Late Carboniferous
Origin: Inner Mongolia Jungar Banner
Mr. Muroi wolf-chenves
Origin: Yi County, Liaoning
Lingyuan Qianlong
Origin: Lingyuan, Liaoning
Chinese Bird Dragon (Model)
turtle
Origin: Jianchang, Liaoning
What kind of a turtle can die with such a relaxing four-legged to the sky...