The MSB & the Butterfly Bunch Part of Set: The Magic School Bus Science Box1 Author: Kristin Earhart ISBN: 9780545167277 Format: Paperback Publication Date: 2010 No of Pages: 32 SKU: 9780545167277 Categories: 7-9 yrs, 8-11 yrs, Magic School Bus Science Box1 Related products The heart and the bottle Read more One cent, two cents, old cent, new cent Read more The incredible book-eating boy Read more Inside your Outside! Read more