When I made cardstock eggs for my woven Easter basket craft, I cut out a bunch of extras to use for other projects. Here's what I did with 12 of those eggs:
I challenged myself to create a dozen completely different patterns using only a black pen. I thought it might be hard to come up with so many different doodles, but once I got going, the ideas kept coming. It was a lot of fun.
So what do you do with the doodled eggs? You can string them to make a banner, or add them to Easter place cards or napkin rings. Or, use them as inspiration for doodling on real eggs! Dye them first and let them dry completely. Or leave them their natural color. With the eggs at room temperature, draw on them using a food safe marker (affiliate link). There are a lot of brands to choose from; I've found there isn't much difference between them. The most important thing is making sure your eggs are completely dry and at room temperature. Enjoy!