Make anything instantaneously magnetic with Scotch Repositionable Magnetic Tape. Simply cut your desired amount, adhere to your treasure and mount it
Scotch .5 x 4' Repositionable Magnetic Tape - Black
Strong Magnet Strips - Search Shopping
6pk 100 Per Pack Adhesive Magnet Dots - Dowling Magnets : Target
Dowling Magnets : Target
Dowling Magnets 1 x 10 Adhesive Magnet Strip Rolls 6pc