When I click "Save" or "Save As" in Illustrator, I don't see PNG as an option.

In some versions of Adobe Illustrator, you'll find the PNG option in different spots. Try these methods:

Method 1:

File > Export > Export As (and choose PNG as your Format in the drop down menu)

Method 2: 

File > Save for Web and Devices

Method 3:

File > Export > Export for Screens

Tip: If all else fails, just take a photo of your screen and share that with us in the Facebook group -- the only reason we want a PNG is to see your awesome work!