Pandemonium breaks out at the science museum as Twitch, the popular squirrel from 8 Class Pets + 1 Squirrel ÷ 1 Dog = Chaos, hitches a ride in a backpack on a school trip.

Twitch the Squirrel sets off chaos during the school trip to the science museum before being smuggled back out in a student's wheelchair in this raucous chapter book with over 50 comical illustrations! Inside the museum, Twitch turns exhibits such as the Bernoulli air pressure table, the Foucault Pendulum, a dinosaur skeleton, and a model of the Mars Rover into his private carnival rides--then there are the messes he makes in the gift shop and employee lounge. In a final chapter, Newton and Galileo, two science room geckos, explain the science exhibits at the museum further.