Non-fiction:
* The World Needs Trees (2021) - A celebration of trees and their importance.
* The World Needs a Hero (2022) - Encouraging kids to become environmental heroes.
* The World Needs Kindness (2023) - A book about the importance of kindness and compassion.
* Ocean Animals (2005) - A guide to the incredible creatures of the ocean.
* Amazing Animals of the Arctic (2016) - Exploring the fascinating animals of the Arctic region.
* Amazing Animals of the Rain Forest (2016) - A look at the incredible creatures that call the rainforest home.
* Amazing Animals of the Savanna (2016) - Discovering the wonders of the savanna ecosystem.
* Amazing Animals of the Mountains (2016) - Exploring the unique animals found in mountainous regions.
* The World Needs More Trees (2017) - A call to action for planting more trees.
* The World Needs Wild (2019) - Celebrating the importance of wilderness and wild animals.
Fiction:
* The Adventures of Finnigan Fox series (2018-2020) - A series of books about a curious fox who learns about the natural world.
* The Mystery of the Missing Monarchs (2019) - A mystery story about the decline of monarch butterflies.
Other works:
* The Little Book of Nature Activities (2019) - A guide to nature activities for children.
* The Little Book of Nature Crafts (2019) - Creative craft ideas inspired by nature.
* The World Needs Us (2020) - An inspiring book about how children can make a difference in the world.
She has also written numerous articles and blog posts about nature and conservation.
This is not an exhaustive list, but it provides a good overview of Elin Kelsey's work. You can find more information about her books and articles on her website and on Amazon.