Cut the hard boiled eggs in half and pop the yolks into a bowl, mix up your favorite deviled egg recipe, set aside.
Dab the top of the whites a couple times with a paper towel to dry them a bit.
Gently draw on your designs, occasionally wiping the pen tip with a paper towel.
Fill the centers with the yolk mixture.
Cover and chill until ready to serve.
I used these Wilton Food Writing Pens.
Full Disclosure: After a couple hours the red did begin to turn into more of a hot pink color.
So these eggs are best served shortly after they've been decorated.
I don't know if the Americolor Pens would keep a true red color longer.
If they want to send me some, I'll gladly conduct that experiment in the name of science:@)
Another fun option, you could dye the whole egg HERE.