Note from the Robot Dreams movie. No AMS needed. Just change the filament at various heights. Ironing recommended. 

You can use negative volume in the slicer to create holes for whatever size of magnets you have. An example here is to use 10x2 or 6x2 round magnets. I suggest adding those holes in the actual magnet area (star and moon) since that's the thickest part, and also makes sense ;)

Of course, you can also print the flat one and just glue a couple of magnets to the back. 

Colours I used:

1. CC3D bone white PLA

2. Sunlu red PLA

3. Sunlu ocean blue PLA

4. Sunlu coffee brown PLA

A darker red would look nicer, but unfortunately, I only have one red filament by hand. Photo coming soon.