The first page of this document is the page to be run off on card stock and laminated. You might want to print several copies of this page because many of the addition problems have the same answer and there will need to be more than one bottle cap of each number for the addition mats. After you have run the first page off as many times as you wish for the caps, you can hot glue them to water bottle lids. I used a circle cutter form Hobby Lobby and I am sure you can find them at Walmart or any craft store in the scrapbooking section. I used the 1' circle cutter and it was the perfect size. You then can run off the other pages of this document to use as the mats for them to work off of...I recommend that you run them off on card stock and laminate as well so that you can use them as a center for a long time to come. This is a great self contained center or something a child can use if they need extra practice in addition!