“…These 3-D printer cost reductions also have enabled 3-D printing education applications, which are now broad and widespread [33], including: medical education [34,35], in particular anatomy [36,37] and prosthetic applications [38], special education [39], cultural heritage [40], geoscience education [41], engineering [42,43], STEM education [44][45][46], sustainable development education [47] and teacher education for digital design [48,49]. Robot hardware has been designed for education, ranging from electromagnetic field mapping robots [50], to Shybo, a low-anthropomorphic robot for children [51], and YOLO, a creativity-stimulating robot for children [52].…”