(Paperback)

Andrew, Judy, and Thudd have escaped the Big Bang only to find themselves trapped inside the Earth as it forms all around them. Meanwhile Uncle Al is stranded in the Ice Age. Somehow the kids must fix their time machine and rescue Uncle Al. Illustrations.

(Paperback)

Andrew, Judy, and Thudd have escaped the dinosaurs only to find themselves surrounded by the woolly mammoths of the Ice Age! Can they locate their lost Uncle Al and travel back to their own time before the evil Dr. Kron-Tox puts his nefarious plan into action

(Paperback)

Andrew, Judy, and Thudd are out of the whale, but not out of trouble, when the Water Bug gets caught on the Great Barrier Reef! This is the third in a four-book set that will take the kids on a tour of undersea phenomena-from the Great Barrier Reef to the Mariana Trench to the inside of a whale-as they try to find their way home.

(Paperback)

When Uncle Al is kidnapped by Dr. Kron-Tox and sent to prehistoric times, Andrew, his cousin Judy, and Thudd the robot try to use Uncle Al's latest invention, the Time-A-Tron, to rescue him, and learn first-hand about the origins of the universe.