Jumbie Jam Songs by Letter Song Book - Childrens. This Jumbie Jam Songs by Letter Songbook is a collection of fun & familiar songs designed for the Jumbie Jam that are great for family music-making. You dont have to know how to read music to use this beginners song book; the notes match the note letters marked on the Jumbie Jam. Printed in EASY TO READ/LARGE LETTERS. Can be used to play other instruments toostart a band at home! It contains eight songs; Twinkle Twinkle, Mary had a Little Lamb, Old MacDonald had a Farm, This Old Man, Row Row Row your Boat, Doe a Deer, Chopsticks, and When the Saints Go Marching In.