Encyclopedia of American Holidays and National Days: Volume 1  Did you know that the Puritans did not celebrate Christmas? That trick or treating on Halloween began in the late 1930s? Every holiday has a history, and this set sets out to describe them all.
  Encyclopedia of American Holidays and National Days: Volume 2  
  Holidays - Kids InfoBits  

Crafts

  All New Crafts for Kwanzaa  The family Kwanzaa celebration can be made even more special when the children contributes to the festive air. Youngsters can enhance their family's Kwanzaa celebration with a "Light the Candles" Kwanzaa Card, a Nguzo Saba Favor, or a Bendera Notepad all made from easy-to-find houshold materials. Among the twenty-two easy-to-make crafts are some projects that can be used to decorate for and celebrate the holiday and others that emphasize the meaning of Kwanzaa.
  More of the Best Holiday Crafts  Best-selling children's craft expert Kathy Ross offers a collection of 65 holiday-based craft projects, each one guaranteed to turn out beautifully. Patterned after Millbrook’s original BEST HOLIDAY CRAFTS EVER bindup, this volume contains 100% new material. In addition to Valentine’s Day, Earth Day, Easter, Halloween, Thanksgiving, Hanukkah, Kwanza, and Christmas, a number of new holidays have been added, including Flag Day, Memorial Day, 4th of July, President’s Day, and St. Patrick’s Day. There are creative decorations, favors, cards, and gifts designed to enhance holiday celebrations throughout the year. Step-by-step illustrated instructions call only for scissors, paste, household recyclables, and an occasional craft-shop item.
 

Halloween

  Hooray for Halloween!  This site examines "the science of Halloween: bats, brains and cemeteries" (THE WHY FILES). Learn about the biology of bats, the study of the human brain, and the archaeology of burials through this humorous, Halloween-themed article.
 

Thanksgiving Day

  New Crafts for Thanksgiving  All New Crafts for Thanksgiving is newest title in the updated and completely new series All New Holiday Crafts for Kids. It features crafts such as gourd turkeys, pilgrim place cards, and a stick trivet.
 

World Holidays

  Holidays, Festivals, and Celebrations of the World Dictionary  Describes 2,500 holidays, festivals, commemorations, holy days, feasts and fasts, and other observances from all parts of the world. Entries cover popular, ethnic, religious, and historic events of international, national, regional, and local significance.
  World Holidays: A Rosen Guide for Children  A guide to celebrations and holidays around the world, including religious, civic, and cultural practices.