Summary Sphere usable not only for Christmas decoration of your tree but also for any other occasion. You can hide some small metal bolts inside to make sphere rattle :-) Designed to be easily printable on most 3D printers. Designed by Martin Žampach - creative director of Be3D printers Instructions Print both halves and glue them together. Optionally hide some small metal bolts or marbles inside to make sphere rattle. :-)