The Fall of Freddie the Leaf by Leo Buscaglia
It's beautiful, and brief.
https://www.amazon.com/The-Fall-Freddie-Leaf-Aniversary/dp/0805071954/ref=cm_lmf_img_14
Preceding the need to share this story with them, I tried to make the death of a family pet, part of a routine , of grief and the acceptance of death. [circle of life stuff]
One of my favorite movie scenes is from Poltergeist where the mother finds the little girl's dead parakeet, and is all bugged out because she thinks it will traumatize the girl, so she tries to get rid of it and buy a new one before the girl gets home from school, only to have her come home early and they shoot this angle:
Then immediately switches to this canary funeral(canary in cigar box coffin) out in in the garden:
After the prayers they get up and walk away, and the little girl with a big smile says "Can we get a goldfish?" while the dog begins digging up the grave in the background...:)