Mighty Mind metal Play Tray (#40122) with magnets and a bonus set of design tiles will convert a non-magnetic set into a magnetic set. With the Play Tray, you can now convert any MightyMind / SuperMind or Aquarium Adventure activity set to make it Magnetic. Our newest add-on precision cut peel and stick soft magnets can be easily applied directly to MightyMind or SuperMind Design Tiles. Comes with a Sturdy Metal Play Tray 32 peel ‘n stick magnets and a bonus set of 32 MightyMind / SuperMind Design Tiles.