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When Keesha discovers mold on her sandwich, the class takes off on a tour of the mini microbe world, and they learn first hand that these little creatures can have HUGE effects. Ms. Frizzle proves that there is always more than meets the eye in this GIGANTIC adventure.

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First Sentence edit see section history

"All right!" Ralphie waved his lunch bag and ran outside to the playground.

Series & Lists edit see section history

This is book 6 of 35 in Magic School Bus - Science Chapter Books. (publisher series)

Preceded by Twister Trouble, and followed by The Great Shark Escape.

Authors & Contributors edit see section history

  1. John Speirs (Author)
  2. Anne Capeci

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