A Printable Rhombicuboctahedron as drawn by Leonardo da Vinci in Pacioli's Divina Proportione c.1495 with a captive ball.

This model tests your printers bridging and overhangs and should be printed without supports on the external shape and supports to the bed to support the ball. Suggest scaling to 30 - 40 %. Break away the balls supports once printed to allow it to rattle inside.