Reddit reviews The Kids Book of World Religions

This book covers the major world religions, without bias.
World Religions Book

Also, here’s some historical reading on the Bible, if you want a good companion to understanding it, apart from any misconceptions your family may have.
The Complete Guide to the Bible

I don't know of any UU-specific books, but in the spirit of UU, maybe it's better to offer a variety of perspectives?

• Great Adaptations is a colorful and fun book about evolution and natural selection.
  
• Stories of the Prophets in the Holy Qu’ran is a colorful and fun introduction to the Muslim perspective on familiar (and unfamiliar) stories.
  
• Sitting Still Like a Frog is a child friendly introduction to mindfulness and meditation
  
• What Do You Believe and The Kids Book of World Religions also seem like they might be helpful

Some of the books we use:

The Kids Book of World Religions

The Belief Book

Awkward Moments (Not Found In Your Average) Children's Bible Book Series

I'm going to order the Church of Satan Activity book for this holiday season. Only $5! Thanks /u/lifebeatmyass

The Brick Bible is great. It tells the complete story of the Bible, instead of just the "nice" stories. But it uses legos, so it isn't so horrifying.

https://www.amazon.com/Brick-Bible-Complete-Set-Presents/dp/1626361770/

Also, search on Amazon for World Religions. Teach them all about the different world religions and how someone's religion depends on their parents, and not truth.

This is the book I used. More education is better, especially if you live in the Bible belt.
https://www.amazon.com/gp/product/1554539811/

The Kids Book of World Religions Even has a section about atheists.

DK What Do You Believe is more accessible with great history.

http://www.amazon.com/The-Kids-Book-World-Religions/dp/1554539811

Late to the party here, but Our Family Tree and Life Story are both great evolution books for kids, as well as Born With a Bang: The Universe Tells Our Cosmic Story and the subsequent books in that series. Older Than the Stars and Big Bang!: The Tongue-Tickling Tale of a Speck That Became Spectacular are both good ones about big bang theory. For world religions/different beliefs, try What Do You Believe?, The Kids Book of World Religions, or maybe a collection of writings from different religions such as A Child's Book of Blessings and Prayers; a book like What Is God? or About God might also prompt some good discussion.

source: scientist who teaches 5-6 year olds every sunday at a Unitarian Universalist church

(if you have a UU church nearby, might be worth checking out - they can be a great resource for atheist/agnostic/multi-religion households trying to make sense of these issues!)

This book is pretty good:
The Kids Book of World Religions

Its pretty easy, religion should be a personal choice made by the child when he/she is ready.

http://www.amazon.ca/The-Kids-Book-World-Religions/dp/1554539811

Best you can do is talk them, answer your questions and support them in whatever they choose if they ever make a decision. If you instill a sense that they should come to you with questions they will be just fine.

this one was helpful for my children when we left our religion: https://www.amazon.com/Kids-Book-World-Religions/dp/1554539811/ref=sr_1_3?ie=UTF8&qid=1474913111&sr=8-3&keywords=world+religion+kids I wanted them to see the broader picture of religion and see how many similarities and the uses of religion. Highly recommend. They were fascinated and really enjoyed learning more about the world through this lens.