ISBN-13: 9780996324434 / Angielski / Miękka / 2016 / 46 str.
In a world full of grumbles, both soft and loud, it can be hard for a child to find power in their own small voice. Rumbly, Grumbly is the tale of a little cloud trying to understand negativity and how to overcome it. In his journey is a lesson of contributing positivity to the world.