This Custom Set allows you to pick out just the dogs you want OR to fill in the gaps in your previous dog pattern purchases while saving money at the same time. I did both. I chose the Boston Terrier, Beagle, and Border Collie the first time. When I decided I wanted more dogs, I used the Custom Set to pick up the stray dogs that I didn't have yet. As always, instructions were clear and easy to follow for all of the dogs that I purchased and made!