I fell in love with hotkey's Ninja Fridge Shuriken http://www.thingiverse.com/thing:6383 and so designed a few of my own, and based some on http://www.thingiverse.com/thing:323I put holes in the middle to cut down on plastic a little. and beveled edges but tried to keep it to 60 degrees so you shouldnt have a problem printing them.Each star should fit on a makerbot, the stars.stl is one file with all 10 stars on it, but you better have a big bed to print it! it is a 3 hour print for me but than you have 10 Shurikens!The magnets I am using are http://www.fridgedoor.com/mabl25x25x15.htmlI put two magnets opposite facing for the big spots.. and crazy glue them all in place. I have not found any fridges that have a polarity so this has not been an issue. Oh, Hopefully your prints come out better than mine, it takes me about a minute a piece to clean them up with hobby knife.Print, Enjoy!