"Not on a Twain"

I bought Green Eggs & Ham at the local Barnes & Noble yesterday. The girls picked up on it immediately. After one read through, Morgan takes it, starts leafing through it, and recites from memory passages from the book: "Not here, not there," "Not on a twain" over and over. Rachel chimed in as well. They're only two! But obviously precocious. It was also very cute. How I love them so much.