There are two ways to print this, either download cat_toy_outer_cut and cat_toy_inner_cut to print or arrange the large outer ball halves and small inner ball halves separately, or download cat_toy_cut to print the inner and outer ball halves nested together.After printing simply clean up the halves and glue together, making sure to get the position correct so the cuts line up correctly and without forgetting to put the small ball within the big one before gluing.