If you're looking for resources to teach your kids Japanese, this includes intro books, hiragana, katakana, and kanji books and flash cards.
First Bilingual Books for Kids International Children's Books
The Essential Guide to Learning Japanese with Children's Picture
7 Must Read Children's Travel Books for World Book Day
Top 16 Nonfiction Books for Kids from Around the World
Kids' Books, Japanese
Get Kids Dreaming of Adventure with Travel Books from Lonely Planet Kids-Giveaway - Mommy Kat and Kids
The Essential Guide to Learning Japanese with Children's Picture Books
9 Wonderful Japanese Children's Books in Translation
Let's learn Japanese using Japanese children's book
Books that Teach Japanese to Children » KidsTravelBooks
Kids' Books, Japanese