Step 5: Painting/Staining
I decided to stain my Tetriminos, and found three different Minwax Wood Finish cans to do the job. The Tetriminos got divided up evenly between the three cans, and once I moved to a well ventilated area, were ready to go. It was kinda hard to take pictures of this process since my hands were somewhat covered in stain up until the end.
Depending on your proposed use for your Tetriminos, you'll probably want to coat them with a protective clear finish, or seal.