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The class sees through the eyes of different animals as they search for an escaped (and invisible) Ratny.

Ms. Frizzle shows the class it's ok to fail, as long as you learn something from the experience.

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The kids go looking for rain to test out Jyoti's latest invention, the autobrella, only to wind up with their heads stuck in the clouds.

Ralphie's relatives, a circus troop called The Flying Tennellie's, need the class's help when their trapeze rigger is out. Ralphie and the gang have to use math to make sure the show goes on.

Tim tries to convince Ralphie that trees can talk to each other.

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Ms. Frizzle and her class along with an inventive high-tech bus that invites children on high-flying hijinks that introduce the incredible world of science.