I just had an idea that would make building enviorments so much easier. Could there be something that made it so that you could save designs, and use them multiple times? For example, if I designed a skyscraper, if I wanted to use it in another scene, of maybe even in another project, I could get it from the toolbar? Please add this it would be soooo helpful.
Hi James!
This is possible with both the remix option or copy and pasting your items into another Project.
If you remix a Project, you’ll get a duplicated version of it that you can adapt however you want to so you won’t have to rebuild everything from scratch.
Alternatively you can copy and paste a specific (or multiple) objects into a new Project as well.
Hope that helps 
I have tried Delightex on three different types of devices now, and I have not found any way to copy and paste items. So far, I have only been able to copy and paste code.
Also, I’m thinking in the general area of the “My designs” section in tinkercad, where you can add specific designs.