This is perhaps the most popular beginner keyboard. The official songbook includes 50 traditional songs, including "Twinkle Twinkle Little Star," "Oh! Susanna," and "Jingle Bells." Each page shows the right-hand melody with fingering numbers and the left-hand chords (C, G, F, Am).
If you own a Casio keyboard—especially models like the CTK-2400, CTK-2550, LK-265, or WK-6600—you have likely heard of the elusive "Songbook." This isn't just a manual; it is a library of musical scores specifically arranged to work with your keyboard's auto-accompaniment, light-up keys (on LK models), and tone bank.