Just about anything can be fine for FE gifts. I wouldn't stress about it. Handcrafted magnets are always fun. They don't have to look "professional." E.g., a cool one we got was a hand drawing of mickey by a child. Another cool one was a 3D printed magnet of an anchor with a mickey logo. In addition, we've also gotten stuff from where people are from and thoroughly enjoyed that, too.
However, you should only do a FE if 1.) You are OK with people not liking what you give them; 2.) You are OK with not liking what people give you; and 3.) You will not be stressed by making/acquiring FE gifts.