Twitch the squirrel

A dog chases a squirrel into an elementary school one night, creating monumental chaos.

When Twitch hears that the school children are taking a field trip to the science museum, he decides he wants to join in the fun--so he stows away on the school bus and hides in a backpack to get in. But as always, not everyone is glad to see a squirrel in their midst. Pursued by security guards, Twitch turns the exhibits into his own private carnival rides--swinging on a Foucault pendulum, riding a model Mars Rover, and skittering across the Bernoulli...