Makerbot has gotten a lot of buzz for its Replicator 3D printers, which can interpret designs and then build (print) objects while you watch. They're not the only player in town anymore - there are lots of options for anyone to start doodling or printing in 3D. Staples has announced that it will soon offer a 3D printing service in its stores, starting in Europe. But those of us in the U.S. and elsewhere can check out the following tools to use at home, in the meantime. The list of things you can create with 3D printers is practically endless: napkin rings, iPhone stands, poker chips, jewelry -- even the Eiffel Tower.