Talking about bereavement with children can be hard. There’s a series of books that might help children learn about a number of sensitive issues. One book in the series is Frog and the Birdsong by Max Velthuijs, Andersen Press.
The book concerns Frog, who one autumn day discovers a blackbird lying motionless in the grass. Worried, he asks his friends what can be the matter. Very gently and simply, the animals begin to understand the meaning of death and the beauty of life in this moving story.