Rotton Eggs!

thingiverse

Here is my design submission for the TinkerCAD/MMF Easter Design Challenge! My three design goals were to be able to print without supports, have an eggshell that locks together securely, and (of course) to be irresistibly cute. I spent most of my time figuring out an eggshell design that would print without supports and latch in place relatively securely. I tried hinges and threads, but there were too many complications. My kids kept cross-threading or breaking my prototypes every time, which told me that wasn't the solution. I eventually settled on nubs that wedge firmly in place when the two halves are twisted together. The outside of the shell is egg-shaped, but the inside uses a more pointed "ogive" hole shape to create the cavity. This shape tapers to a point, allowing you to adhere to the 45-degree rule and avoid overhangs or sagging deposits. The characters who live in the shells are created using mostly spheres, various banana shapes, and Christmas trees for all the facial hair. To create the damaged areas I used spheres, asteroids, and terrain shapes as "holes". Just for fun, I printed several in white so my kids can paint them! I hope you enjoy printing these! This object was made in Tinkercad. tinkercad.com/things/3rQK6ilflAc