The button maker kit includes a hand-press style button maker, a paper cutter to cut out 2.25″ circles (and a small square of thick cutting mat), and some button pieces (front, back, and clear plastic cover).
If you plan on making more than just a few buttons, please order a set of button supplies. From Amazon, a supply kit for 100 buttons costs about $40. If you do not need that many, consider contacting another library scheduled to borrow the button maker and splitting the cost of the supplies.
Watch this video to see the button maker in action:
Use a 2.25″ template to make the buttons:
http://www.umakebuttons.com/templates.php