1. In The Lorax, what did the Once-ler make from Truffula Trees?
Thneeds.

2. In One Fish Two Fish Red Fish Blue Fish, what is the unusual feature shared by all Zeds?
They have one hair upon their heads.

3. Which Dr. Seuss character said,
"Oh, the things they will bump! Oh, the things they will hit! Oh, I do not like it! Not one little bit!"
The fish in the pot, from The Cat in the Hat.

4. Which of the following is not a Dr. Seuss title?
Cloptrop, The Big-Headed Horse.

5. Which of the following was the first children's book Dr. Seuss wrote?
And To Think That I Saw It On Mulberry Street.