I could only find the hard styro balls at the shops I went to. I offered to help my daughter Caitlin's class make these as present for their parents. I finally got round to making one the night before I had to help and found it fun and easy.
Her teacher was worried that the kids would have trouble and that they couldn't be trusted with craft knives (they are 10).
So I pre-cut all the balls and she pre-cut the fabric so that we could concentrate on making them. We used iceblock sticks to do the fabric insertion. The class was finished in 20 min and under. We had a couple who got carried away and split their balls by pushing too hard. On Monday they are going to glue ribbon along the seams to finish them off. The teacher was surprised they had done so well. I knew they could do it. They were all pleased with themselves and looking forward to finishing.