Interesting way to start a discussion with kids about chemical reactions!
Here are some reviewed children's book titles I found at
http://wow.osu.edu/experiments/chemistry/childrenslit.html 1. "The Magic School Bus Gets Baked in a Cake: A Book About Kitchen Chemistry." By Linda Beech, illustrated by Ted Enik. Book adaptation of an episode of the animated TV series The Magic School Bus, based on the series by Joanna Cole and Bruce Degan. Scholastic, Inc.: New York, 1995. ISBN 0-590-22295-3.
2. "Science Project Ideas About Kitchen Chemistry." By Robert Gardner. Enslow Publishers, Inc.: Berkeley Heights, 2002. ISBN 0-7660-1706-0.
3. "Acids and Bases." By J.M. Patten. The Rourke Book Co., Inc.: Vero Beach, 1995. ISBN 1-55916-128-0.
4. "The Atoms Family." By J.M. Patten. The Rourke Book Co., Inc.: Vero Beach, 1995. ISBN 1-55916-125-6.
5. "Elements, Compunds, and Mixtures." By J.M. Patten. The Rourke Book Co., Inc.: Vero Beach, 1995. ISBN 1-55916-127-2.
6. "The Usborne Illustrated Encyclopedia: Science and Technology." Usborne Publishing: London, 1996.
7. "The Usborne Internet-Linked Library of Science: Materials." By Alastair Smith, Phillip Clarke, and Corrine Henderson. Usborne Publishing: London, 2001.
8. "The Usborne Internet-Linked Library of Science: Mixtures and Compounds." By Alastair Smith, Phillip Clarke, and Corrine Henderson. Usborne Publishing: London, 2001.
9. "Janice Van Cleave's Molecules: Mind-boggling Experiments You Can Turn Into Science Fair Projects." By Janice Van Cleave. John Wiley & Sons, Inc.: New York, 1993. ISBN 0-471-55054-X.