I tried printing the original Ducky first, but the supports left it looking a bit ugly. I found this remake and gave it a shot. I scaled it down about 50% and used TTYT3D Fast Color Gradient PLA Filament and it turned out amazingly beautiful!

I printed this on an MK3S+ with an 0.2mm layer height, 20% infill (to help speed the gradient color change) without any brim or supports.