Repeat step 1 with a second sphere. Then position the bottom halves of 2 more spheres so that thye form a square with the heads of the bolts of the assembled spheres placed in the grooves of the 2 open half spheres.
Press the other 2 top halves into place & you will have completed 1 layer. Repeat these 2 steps again for each of the other identical layers & then stack.
Click on the Details Tab below for assembly instructions.