Exclusive: Stardust Retro Modern Robot Christmas Tree Ornaments Set/4.  We created our Modern Ornaments for Christmas Trees in glass with hand-decorated accents in our range of Modern Holiday Decorations.  Set of four figurines in glass.  Stardust Retro Space Robot Christmas Tree Ornaments Set/4. A delightful retro modern Christmas Ornament set to hang from your Christmas Trees in our range of modern holiday decorations. Small but exquisite, these adorable Retro Space Ornaments are crafted by hand so no two are ever exactly alike! Combine with other Christmas characters from the our holiday collection.