Heart shaped magnetic buttons. Use it for the things you love or the ones you love. Simply integrate a 8mm neodymium magnet. Or use it for decoration. You can use the Customizer to generate your own words and phrases as you need. I have newly added a Customizable Key Chain "Words from the Heart". Layer height: 0.25 Infill: 20% I used Cura with the standard "Pause at Height" Plugin. So color change is really easy and exact, at least on Prusa i3 and similar printers. For the settings I have used, please refer the screenshot in the gallery. The printer pauses on the correct layer for color change. After changing the color you have to press a button on the printer. So I think the printer must have a display to use this plugin. Another methode is shown by EtienneDusablon here. Neodymium magnet suitable: 8mm x 3mm and for long text 5mm x 2mm. Transparent up to 4mm height Red up to 6.5mm height White up to 7mm height again Red up to 8mm height Black up to 8.5mm height You can easily print it in monochrome and color only the heart outlines by hand.