The History of Labor Day
http://www.dol.gov/OPA/ABOUTDOL/LABORDAY.HTM

Labor Day Crafts
http://www.enchantedlearning.com/crafts/laborday/

Labor Day Lessons and Activities
http://www.lessonplanspage.com/LaborDay.htm 

Labor Day Lesson Plans from Education World
http://www.educationworld.com/holidays/archives/laborday.shtml