This is a re-post of a shirt that I still love. I have made a yo-yo shirt for me and a few for my girls. It is a great embellishment that adds a pop of color and dimension. There are tons of tutorials on how to make yo-yo's (see previous post). Or you can do what I did, and just buy them off of etsy.
None - it is just gluing the purchased yo-yos to a shirt in whatever pattern you want. SO EASY!!!