A remix of these amazing models found here: http://www.thingiverse.com/thing:463063
To print, lay them on their backs, have supports on, use a brim, and have the "Combine all" option selected in Cura.
Want to access even more models not found here in Thingiverse? Interested in supporting my efforts making free models for the world to enjoy? Check out my patreon page here: https://www.patreon.com/mz4250