You can share a whole project folder with your teammates with just a single link. Click "Share" on the cover of your project folder and copy the generated link to share the entire project folder and all projects inside with anyone you want.
Note: This generated link also automatically detects the access level of your teammates. If they are members of the project folder, they are free to view and access all projects inside. If they are not members, they may only view and access projects that they've been invited into.