For this project let's start with the image designs.  I have added in a baseball, football, basketball, and baseball bat.  I next sized the designs to be close to the end size of the charms.

Next we need to add in an outline to the design so that we can use it to cut the shape out.  I also add in an additional circle to use as a loop for connecting the charm to the craft.  Use the combine tool and the unite option to create a single vector.

Next, add in a smaller circle to use as a cut out for attaching to the crat. 

Next add in more designs and apply the same steps to outline and add the loop on the top.