Off the top of my head there is one at DTD near the Guest services, one in Nemo in Epcot, one in Imagination Pavillion at Epcot, one Mission Space training labs at Epcot, in RnR at DHS. They run $10-20 ish depending on the one you want, but if it's really important be sure to check one or two early in your trip we see certain designs sold out and the machines down alot.