(Paperback)

This easy-to-understand book tells why and how the Constitution of the United States was created. "Simple, attractive, informative....The most accessible history of the Constitution to date."-School Library Journal.

(Paperback)

This carefully detailed presentation of how "fruit comes from flowers", from winter's snow-covered buds through pollination and growth to ripening and harvest.

(Paperback)

Now in paperback--a comprehensive history of clocks and calendars from aroundthe world, from the distinction of B.C. and A.D. to the Gregorian calendar tothe year 2000, which marks two millennia of human achievement. Full color.

(Paperback)

Explains how leaves change their colors in autumn and then separate from the tree as the tree prepares for winter.