When I've given people 3D printed gifts in the past, I've received comments about how satisfying it would be to break the delicate shapes. To my horror, however, I couldn't find any models out there that are designed to break in satisfying ways. So, after extensive testing (10 minutes of doodling and looking through my filament waste bin), I designed 4 shapes that I hope will yield high breakability and pleasure ratings. I then printed them in my most brittle filament.

Notes:

• The support box was designed to be printed inefficiently, on its side. This will generate support and allow those unfamiliar to experience the joy of removing it.
• My model for the support box was 2.4 inches tall, but that took a while to print and it doesn't need to be that tall. So I shrunk it a little for this STL.
• The ring STL is just one ring, but I duplicated it in my slicer and arranged them to form two slightly conjoined rows of three, like one of those disposable plastic 6 pack soda holder things that do a great job at killing marine life once discarded in the ocean.

The rings took ~18 mins, the asterisk took ~20 mins, the tube took ~30 mins, and the support box took ~3 hours (although it'll go a lot quicker now that I shrunk the STL for this post)