Use a keyring or a small paperclip as a temporary zipper pull. For a permanent fix, swap the broken pull tab with a new one by sliding it into place. Squeeze it closed gently with a pair of pliers.

If they had used black, it wouldn’t show at all, except now there is just a tiny bit of pull on the hoodie ... back to the bag. Got a broken zipper box? You can fix that with 3D printing.

The first problem — a chewed-away zipper bottom — is quite common, but requires no sewing to fix. As you’ll see in the video below, all it takes is a drinking straw, some hot glue ...