Edit: I realize now that I jumped the gun a little bit, so enjoy this extended window of time to consider the many still life images you would like to create, I’ll release the next prompt a little closer to the actual day it starts.
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First things first, I want to congratulate everyone who submitted art for the first prompt, there was a ton of wonderful images that brought a smile to my face. If you haven’t had the chance to do a movie themed piece, it’s never too late! 
Now, on to the next prompt!
Dust off your fine art skills, the second theme is Still Life.
Create a classic bowl of fruit!
Model a single object with as much detail as possible!
Recreate a classic painting!
Make your own topic and post one (or several!) submissions
If you need some more inspiration, the wikipedia page on still life paintings has tons of examples: https://en.wikipedia.org/wiki/Still_life
This also might be a fun one to experiment with lighting. The focal point should be the modeling and composition, but lighting can have a big effect on a scene. Many still lifes have pretty dramatic lighting, so play with it!
For an example from the original challenge - Here is a Zippo lighter by @Henske
If you have any questions, please post them in the 10 cubes intro/rules topic, Have fun everyone!