"A Squirrel narrates this story of a family get-together turned upside down when he climbs down the chimney to join the festivities"--

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...