Captain Seasalt And The ABC Pirates “X” Flashcards Let’s explore X island, and learn about things that start with the letter X. Contains 9 Cards: Xerus, x-ray fish, xylophone, Xantus's Hummingbird, xigua, x-ray, X marks the spot, X's and O's, xoxoDownload Related Episodes & Articles An Exciting Expedition on “X” Island