Well, this isn't so much about "Jesus" per se but it's about most religions --
All about the Golden Rule and its equivalent in the major religions (and some smaller/less known cultures as well). It's quite introspective. Dd1 really was captivated by it and as a result, is very interested in peace and justice issues. Dd2 (4) was less interested in it - although she listened, and had questions, she wasn't quite as captivated as her 7 year old sister.
Have you asked your librarian about this? You might end up going through several books and reading them yourself, books from a Christian perspective and then discuss as you read them....
Is this something you could explain without a book? Discuss, look up some pictures online, that sort of thing instead where you can direct it more yourself and if you discover a significant DISinterest once you get going, you can stop?