Things Just Add Up Dr. Seuss wrote and illustrated over 60 books in his lifetime under the pen name Dr. Seuss and many of them are still firm favorites with families the world over today. Two of his most beloved characters who still get screen time on PBS are Thing 1 and Thing 2. Though it is hinted that there are more of these cantankerous little blue-haired minions in the Seuss universe. So, why not try on a number of your own with these Thing 1-9 Patches!