My students and I love Alison Mathews' book "Doodles". I like to use the short pieces as a springboard to composing, with the children first learning what's there, then adding to it - for example with an introduction, ending, variations, and ultimately their own musical ideas. The use of doodle graphics is a brilliant way to capture their imagination and inspire creativity, and with so many different ones there is plenty of variety, even with the simplest 'Doodles'. They are also great way to build confidence in your more reluctant composers, since they can start by just following the one suggestion in the book, and then gradually build up to creating their own music. The pieces can be used for sight-reading practice or as a basis for impovisation as well, so it's a really versatile resource. When my students arrive at their lesson so excited to show me what they have created that week, I know I'm on to a winner!