It's a baby rattle! Please use only under direct supervision. 3D printed PLA has not been tested for cohesion or stability under continuous saliva exposure. If the material begins to break down or the color seems to be running, diminishing, or leaching out, please discontinue use. Take care in inspecting the toy before and after each use to determine the structural condition of the unit, and discontinue use if it begins to degrade. By downloading this design, you take all responsibility and liability for any resultant problems or damages. Possible side effects include permanent injury and death.Print the ninjaball first (or at the same time), then pause the print sometime when there's enough space to drop it into the rattle. The handle should be facing up, no support required though a brim might be necessary depending on the quality of your adhesion. Ninjaball still needs to be rotated 90 degrees (X axis works) and then no supports required.