If I can make these, anyone can! I haven’t sewn in 20 years, but another Mom was recently making this “Holiday Pillow Cases Set” for her nephew, and I just had to try it for my Godson. (Directions located at the end of the post.)
My Godson’s set contains: Memorial Day/4th of July; Halloween; Easter; St. Patrick’s Day; Valentine’s Day; and, Christmas.
This one serves as Memorial Day and 4th of July:
My very talented 16-year old daughter took it one step further by adding an embellishment to the pillowcase: 
Choose which directions are easiest for you: Google Docs The Cottage Home
Tales from the Mama Duck 