I don’t really understand why stainless steel isn’t magnetic. Steel is mostly iron; aren’t all ferrous substances magnetic?
We were also appalled when our new fridge proved to be unfriendly to magnets. But then my dad got these super strong magnets - on normal magnetic surfaces they stick so hard you can barely pull them off. On the fridge they work like normal magnets. Dunno what is up with that.
I was gonna suggest this.
Neodymium magnets or rare-earth magnets work well on my fridge when others do not.
I used to have to order them from China when I built a couple of generators, but they’re quite common now and you can find and/or buy them everywhere. I’ve even stolen some from the kids toys, locker mirrors, employee name tags, etc…
How about simply not covering your refrigerator with a bunch of crap? No offense to your kids’ artwork. Mine is covered in stupid magnets and receipts and I hate it.
If you must display things, try a bulletin board on a different wall. They make them magnetic, too.
Don’t waste your money.
Yes, I recall saying, “Gosh, honey, I guess there’s no way to put stuff on the fridge any more” with great sympathy. 
“Gosh, honey, do you mind if I weed the bulletin board? There’s a takeout menu here from before we moved 3,000 miles, two coupons from companies that have gone out of business and a reminder to get your car smogged before June of 2009.”
Steel sheets can be bought, cheaply, in Hobby Shops.
4 screws into your kitchen wall, & you’ve got a bulletin board, magnetic type.
(ETA: garygnu and Armature Barbarian:) You both work for Samsung, don’t you?
Will any neodymium magnets work or do they need to be larger than a certain size? They’re cheap enough on Amazon if the little disks will be sufficient (and cheap enough to experiment if it’s a ‘it depends’ kind of thing.
You can buy a framed magnetic whiteboard, with a bunch of magnets and markers, for under $20.
If your family doesn’t have one, I recommend it as a central buy-this and note center.
bluetack.
the stuff that is like chewing gum maybe a different marketing where you are.
(I’m quoting j_sum1 out of order here. He actually posted before Really Not All That Bright.)
Anyway, from that Wikipedia site which dowsn’t really answer “why” austenite steel isn’t magnetic, there’s a picture of the austenite FCC structure and the Ferrite BCC structure. So if you tell me Iron in one of those structures is magnetic and Iron in the other one isn’t, I can think “yeah, OK, I can see where that could make a difference.” But is there some “first principal” way to look at them and tell which one of the two would be the magnetic one? Would I have to know the bonds that are formed in the crystal, so I could know if there were unpaired electrons or something?
I had some rather funky friends who decorated their kitchen wall with the door of an old fridge. Just bolted it to the wall all by itself. They used it to hold their nicknacks magnetic letters. You might try that.
You’re assuming everyone has just some blank wall in the kitchen they can use for such a purpose. Not everyone does. I know I don’t.
But fortunately the new Kenmore we got last year still works just fine with magnets.
Glue.
Cabinet door.
Knock yerself out.
We have a couple of steel filing cabinets here at my shop. For 18 years they’ve been covered in various quality bits of artwork from my buisness partners kids. As the layers got deep each and every piece from the under stratas was put in a drawer. His middle kid was here a few weeks ago and opened that drawer and was flabbergasted to find them all carefully preserved. For a moment I thought I was going to see a 15 year old boy cry.
Think what great wedding gifts they’d make!
(but only if there are equal numbers for each party - provide equal ammo to each) 
You kind of got that the wrong way around. Generally you would use a magnet to determine the crystal structure rather than begin with the crystal structure and try to determine whether it is magnetic.
Magnetism is caused by unpaired electrons producing a dipole moment which is positively reinforced due to the repetition in the crystal structure. In that sense it is well understood. However, the specifics are complex and I admit to my eyes glazing over and nodding blankly whenever the subject comes up.
I do know that for iron, both ferrite (body-centred-cubic) and martensite (body-centred-tetragonal) phases are magnetic. Austenite (face-centred-cubic) is not. Magnetism is possible in fcc crystals (Interestingly, nickel is an example) but it doesn’t occur for iron.
Transformation from ferrite to austenite occurs at elevated temperatures (above 738°C). Addition of nickel to the steel brings this temperature down to below room temperature – or at least down below a temperature where crystal structure change is kinetically possible. It is weird because both iron and nickel are magnetic but a mixture of the two is not.
I assume you mean checking if it’s austenite by seeing if a magnet sticks to piece of metal.
Yeah, in thinking about this some more, I don’t think it’s the element (through it’s nuclei) that’s magnetic, it’s the electrons. The element or alloy and their crystal structure set up the electron structure, and it’s the electrons’s structure that determines magnetism. You’d need to know the electron orbitals of the bonds in a particular crystal to determine if a material is magnetic.
Or, you know, try to stick a magnet to it.
That’s often a problem when you upgrade your platform; older apps aren’t compatible.
You’ll probably have to upgrade to Magnets 4.0. Might as well anyway; Magnets 3.7.1 was pretty crappy.