Instead of stuffing the balls per the instructions, I fit the two crocheted halves over purchased felted balls. See photo. (If I do this again, I’ll try to felt my own interiors from roving.) I used up cotton remnants from my stash for the coverings.

Pattern is available at:https://www.etsy.com/listing/89677783/crochet-pattern-rainbow-ball-by?ref=shop_home_active_7