ELEGOO ships every Neptune 4 with a pre-sliced print file on the included SD card. Print it first. It is already optimised for your specific printer and confirms that the machine, the bed, the extruder, and the firmware are all functioning correctly before any slicer settings are involved. If this print fails, the issue is hardware or calibration — not your settings. If it succeeds, you have a confirmed working baseline.

A 20×20×20mm cube that should measure exactly 20mm on each axis when you put calipers on it. If it measures 19.6 or 20.4, your e-steps or flow rate need adjustment. This is the most important calibration print for anyone planning to print functional parts where fit and tolerance matter. Print it in whatever PLA came with the printer. Measure it. Adjust if needed.

A tower that prints identical segments at different temperatures — typically stepping down from 220°C to 190°C in 5°C increments. Inspect the finished tower: the segment with the sharpest overhangs, least stringing, and best bridging is your optimal print temperature for that specific filament brand. Do this once per new filament brand and you'll always know your correct settings without guessing.

Desk cable clips, cord holders for the back of monitors, and cable spine organizers. You'll use these immediately and print them in 15 minutes. They are the perfect first "real" print because they are small, quick, low-stakes, and genuinely useful. Search "cable clip" or "cable management" on Printables for hundreds of variations.

A phone stand is your first multi-hour print — long enough to test that the printer runs reliably unattended, but short enough that if something goes wrong you haven't wasted an entire evening. It is also a print every person in the house immediately has a use for. Search "phone stand" on Printables — filter for "makes" count to find proven designs.

A key organiser (the Swiss Army knife-style key holder that folds multiple keys into a single compact unit) is a genuinely useful daily carry item that tests your printer's ability to handle small, precise features. Print it, use it, and you'll get the first "I made this" moment that makes the hobby stick.

A small clip that holds the loose end of a filament spool when the spool is not loaded in the printer. Without it, the filament end unspools and tangles. Every 3D printer owner needs several of these. It prints in under 10 minutes and is genuinely one of the most-used objects you'll ever print. Search "filament clip" on Printables.

Flexi animals — dragons, fish, sharks, cats — are articulated models that come off the bed already moving. All the joints are printed in place as a single print with no assembly required. They demonstrate exactly what 3D printing can do that no other manufacturing process easily achieves. Search "flexi" on Printables — the flexi dragon is the classic first choice.

A Voronoi vase printed in vase mode (a single continuous spiral wall with no top or bottom layer) produces a structurally elegant result that looks nothing like a "3D printed thing." It tests the printer's overhang capability and demonstrates how vase mode eliminates stringing and internal infill entirely. Silk PLA in gold or copper makes this genuinely display-worthy.

A lithophane converts a photograph into a 3D relief — thick where the image is dark, thin where it is light. Held up to a light source or printed as a lamp shade, the photo appears with remarkable clarity and depth. Use litho3d.net or ItsLitho to convert any photo to an STL file for free. Print in white PLA only — colour filament blocks the light effect. This is the print that makes non-printers ask "wait, that came out of a printer at home?"