Mario Bomb from the Retro Mario Bros. Games! I had a lot of fun making this model and printed out a couple of them for my house. The STL file is meant to be printed on resin printers but can work for plastic printers too. The original size of the bomb is 2inches but you can scale it up to any size you prefer. 

For resign printing (if printing bigger in scale) hollow out the object and put two drainage holes somewhere on the model.