Meet Little Flow, a tiny raindrop who feels too small to matter. When crafty storm clouds creep in on a boy's special day, Little Flow feels guilty for spoiling the party below. But as she drifts from salt-swishing seas to the heights of a mountain, she discovers her journey is just beginning and she is far more important than she ever imagined.

From quenching thirst for a runner and helping a tiny seed wake from its sleep, to forming energy cells in a thundering dam, Little Flow learns that every single drop is essential and there is no limit to what a tiny droplet can be.

This globally inclusive, rhyming exploration covers the uses and treatment processes of water, alongside the water cycle. It is the perfect tool for diving into science, while inspiring children with the power of collective action. After all, it takes a billion small drops to make a mighty ocean!