Find book title by plot?

A group of animals named max, marci, and vera play make believe under a weeping willow tree

Girl goes to visit grandmother who lives by lake during summer. A young girl had drowned in lake and appears to the girl and gives her toys and other articles which grandmother recognizes.

This book is character driven. It is told, I believe, in first person narrative. The protagonist is female. As a small child her face is burned in a home accident when she pulls a pot of boiling liquid off the stove. The accident causes her to be disfigured. She grows up to be a caregiver to a...