Usborne Internet-Linked Introduction to Genes & DNA, by Anna Claybourne. I like some Usborne books, but this one is outstanding. Without talking down to readers or sounding like a textbook, this book gives an excellent introduction to this subject. The illustrations will fascinate you and your kids. I like the combined use of the book and the computer. After introducing the basic information, the book goes on to consider the implications of what we know and where all this science may take us in the future. Some people have found this book too explicit about sex, so if you haven’t had a good discussion about sex with your children, you may not want to start with this book.
The Internet links are good and updated regularly by Usborne. The glossary, timeline, and one-page sheet of basic facts offer easy reference. Ages 9 to 14. $11.95.