The one zipper is mostly decorative on Genevieve's top, another zipper is on Genevieve's hood so now she will wear a hat the rest of winter, but the other zipper is on Ben's only sweatshirt. So I fixed it.
I trimmed off the rest of the plastic teeth above the snip and bound the raw edge in bias tape. I stitched extra hard to make a zipper stop, but if the zipper pull is being dragged up hard, it can still fly off. Oh well.
It's more functional now, and the kids have been warned to keep the bunny's teeth away from their zippers. I'm not keen to replace coat zippers again!