The ball is probably to small for a hamster unless it's a dwarf hamster. Would you be interested if I listed a Petco gift card that she could give her? Then she could use it to buy food or an appropriate sized ball.
I think I've been sending your emails to someone else, I've been emailing back and forth with the morning. I'm not sure how many of them I sent to the other person. Did you get the one about when I looked up Petco gift card amounts, they have to be at least a minimum of $10.