One hot day at the edge of the desert, Maryam and Issa know something exciting is going to happen. Mum and Dad bring spades, Uncle Cedric brings lots of plants and seedlings, the neighbours bring water. Everyone works together, digging, planting and watering - and the children all help too. Then they wait... and hope...Set in Mali, this powerful story is about the creation of The Great Green Wall of Africa, an exciting real-life project to bring trees, growth and regeneration across sub-Saharan Africa.