KEEP MAGNETS AWAY FROM SMALL CHILDREN. Magnets can come loose. If swallowed, magnets can be FATAL.

Another fun Easter Egg design.

Not for commercial use. Please see license agreement.

This design uses 3x2mm magnets to told the two pieces together. 4 magnets on each half are more than enough, but I put 8 holes in so you could change the pattern up by rotating the top 45 degrees relative to the bottom.

Quick Tips: The easiest way I've found to install the magnets is to get a larger rod-shaped magnet (some magnet sets come with them) and place a 3x2 magnet on the end. Put a drop of CA glue in the hole in the egg. Put a drop of kicker (aka “insta-cure” or “activator”) on the magnet, then use the larger magnet to install the smaller one in the egg and slide the pushed magnet sideways off the egg. The 3x2 magnets are deep enough they usually stay put even before the glue sets.

If you're going to print using dichromatic (or trichromatic) filament, you can download MatterHacker's Quantum Calibration Coin for free. The coin is used to determine how the filament pattern is aligned relative to the print bed. You then rotate the objects in your slicer so they align to the filament pattern.

PRINT TIME About 9.5 hours

SAVE TIME I've included my PrusaSlicer 3MF file for the 100% version so those who use PrusaSlicer don't have to work out all the settings.

PRINT SETTINGS A lot of factors will impact exactly how large the holes print. Therefore, I would suggest you do a test print of the first 3mm of one half of the egg. Then, try to insert a magnet. Adjust your print settings or scale the egg up or down from there and try another test until you get it to fit just right. Once you know what works for you, print the whole egg.

If you're not using PrusaSlicer, I recommend 2 perimeters (walls), infill just below unsupported areas using 25% rectilinear (lines) or 15% infill everywhere. I generally used default settings for .15mm high quality settings in PrusaSlicer. I did adjust the temp and retraction slightly for the PLA. I also printed the last few millimeters at 0.1 mm layer height to get better detail. I used MatterHackers Quantum Raspberry Gold.