About this 3D model
Fill the Ball with sand, scale to desired size, remember to scale the parts together. Re uploaded STL files. I was told that the origional file was not loading correctly so lawn dart 1.stl is the new version. Also added parts individually if you want to print them in different colors. This object was made in Tinkercad. https://www.tinkercad.com/things/gdGnGs69nkJ