Skeleton Tree

When Stanley Stanwright finds a bone poking out of the earth in his back garden, he is determined to take a picture of it and send it to the Young Discoverer's Competition, thinking it will help bring his dad back home. But the bone begins to grow, reaching up out of the ground until it turns into a skeleton - a skeleton with an unusual interest in his unwell younger sister Miren. As time wears on, Miren's condition worsens, and the only time she is truly at peace is when she is playing with the skeleton.
But Stanley is wary of him, especially when he finally manages to get a picture, and spots a scythe at the skeleton's feet.