As much as these resources are helpful, they are simply resources. They don't replace daily conversations about Jesus that must happen for our kids to really understand our faith. In our house, we confess our sin to each other often and ask one another for forgiveness. We allow the kids to see us reading our Bibles and if they interrupt, we just read it aloud to them. We encourage them to join us in the worship service, if they're able to somewhat participate (mostly just Liam at this point). We sing worship songs in the car. Our faith in Jesus is personal, but not private. It's to be shared, and our greatest audience is our tiniest disciples.
If you have questions about something I've recommended, please leave it in the comments section and I'll be happy to go into more detail about it.
Kids' Bibles:
The Jesus Storybook Bible by Sally Lloyd-Jones
The Rhyme Bible Storybook by L. J. Sattgast
The Biggest Story: How the Snake Crusher Brings Us Back to the Garden by Kevin DeYoung
The Bible in Pictures for Little Eyes by Kenneth N. Taylor
Some Favorite Books:
The Garden, The Curtain, and the Cross by Carl Laverton
The Storm That Stopped by Alison Mitchell
Found: Psalm 23 by Sally Lloyd-Jones
Just Because You're Mine by Sally Lloyd-Jones
Song of the Stars by Sally Lloyd-Jones
Kids' Devotionals:
Thoughts to Make Your Heart Sing by Sally Lloyd-Jones
The Ology by Marty Machowski
Catechism:
For those who are unfamiliar with the purpose of a catechism or how you use it, these are simple questions and answers about God that we can teach our children that will form a framework for their theology. The questions and answers contain core doctrine for our faith. So when we read a Bible story, they might remember from the catechism, "Who is God?" "God is the creator of everyone and everything!" It has become an important part in our week - every Friday morning - to rehearse a new catechism question and answer with our kids. The New City Catechism has made this simple with a free app that includes the questions and answers as well as kid-friendly songs to help us all hide these truths in our hearts.
The New City Catechism by the Gospel Coalition
The New City Catechism Devotional by the Gospel Coalition
The Jesus Calling Bible Storybook Audio by Sarah Young
Hide 'Em In Your Heart by Steve Green
Hide the Word by Steve Green
Only Jesus by Austin Stone Worship: Kids