Print in single or multiple colors as desired. Each model is printed separate and attached to each other with the connection tab element.
When printing the UFO (top) be sure to use variable layers to get the best finish along with an appropriate % infill. Gyroid 12%+ seems to do well.
In my printed samples I think either my green filament or infill was just not good enough even though I tested it in smaller sections.
Print in glow-type filament for extra fun as well.
Happy Printing!