Fifth-grader Alex Trumble builds a "dingus"--a time machine--after his brother Stephen is kidnapped by dangerous, evil time-travelers, to get back to the past a

Discover the true meaning of being brave in this tender and whimsical picture book from Daniel Bernstrom (One Day in the Eucalytus, Eucalyptus Tree) and Shane E

The reader's choices determine what adventures will occur on a trip back in time to the era of the dinosaurs to find out what an archaeopteryx looks like.

World-renowned zoologist and photographer Naskrecki leads readers on a time-lapse tour that renders Earth's colossal age comprehensible, visible in creatures an

Your mission is to go back in time and discover the identity of the man who fired the first shot of the American revolution, and bring back his musket. From 177