DIY COVID-19 Virus, you or your kid could assembly and play Sphere diameter is 40 mm.
Tested on BQ Hephestos 2, using generic PLA. Best result at layer height 0.1 but 0.2 is also possible to assembly 21 Grams of filament used Print time approx- 3 hours Layer height - 0.2 mm 15% Infill Support - Use option Touching buildplate, otherwise holes in halfsphere could be stuck with support material Build plate adhesion - Skirt.
You have to print: Two halfspheres, 60 - 65 Glycoprotein pieces (some may broke during assembly), Connection ring, RNA.
M-Protein, E-Protein and Hemagglutinin are already welded to the halfspheres.
Paint the parts after print, before assembly or keep it natural PLA color if you wish.
!WARNING! CHOKING HAZARD - small parts not for children under 3 years!