From the official product page on the Looney Labs website;

NanoBlanks are packets of do-it-yourself expansion cards for Nanofictionary (much like Fluxx Blanxx are for Fluxx). Each pack contains 10 semi-blank cards for you to be creative with: 4 Characters, 2 Settings, 2 Problems, and 2 Resolutions. Buy NanoBlanks!

Each packet of NanoBlanks also includes:

The Juror Award: Now your jurors can have a real card to use when giving away their 2 points!

The Wild Idea Action: As you begin expanding your Nanofictionary deck with your own ideas, you'll need extra Action cards to keep the balance right.

The Aquarius Wildcard: This long-awaited card is for use in your Aquarius deck. It counts as one panel of all 5 elements at all times.

(Description quoted with permission from Looney Labs.)