I would like to recommend the website of Palace Museum. I love this website, it's can be used for my teaching. Students can visit forbidden city just through the Internet. 

The website displays many items, like vase, drawings, ceramic arts. Also, there are some videos that are suitable for elementary level teaching. Teachers can play the video and guide students to tour around the forbidden city. The website also shows some galleries, such as The Furniture Gallery, Gallery of Historic Architecture，etc. Teachers can also learn from the website or even create some related activities based on the website information. 

https://www.dpm.org.cn/Home.html

https://www.dpm.org.cn/wyqgg.html

https://en.dpm.org.cn/exhibitions/galleries/2019-04-10/2930.html

Overall, it’s a website that can help teachers to understand Chinese culture better and it is very useful for teaching.