The Bantam Support page has this project guide for an introduction to CNC Milling. The project requires a piece of aluminum 4" x 4" x .125" 

Detailed instructions on the project can be found at this link. 

https://support.bantamtools.com/hc/en-us/articles/360053296533-Pocket-Machinist-Rule

Required for the project:

• Bantam Tools Desktop CNC Milling Machine
• Library laptop
• Datlron single-flute flat end mill, 4 mm
• Metal engraving bit, 80º, 1/8”
• High-strength, double-sided Nitto tape
• ER-11 1/4" collet that comes with your machine
• ER-11 1/8” collet
• Scraper
• Isopropyl alcohol, 91%