Cruising sketchfab I found a great tree swing that I added a swing script [it swings from side to side] It is free and full perms at Monentes Jewelry store. Please never sell. Thank you https://sketchfab.com/dipietron for creating this for us to enjoy.
continuum.outworldz.net:8002:Monentes Jewelry
This has been decimated in Blender, you might take it to blender and make it even lower count. Too much it loses details.