May 31, 2018, 10:14 a.m. by Starre Vartan
A challenge encourages parents to get their kids outside for almost 3 hours a day.
St. Patrick's Day round-up
March 17, 2009, 12:12 p.m.
March 17 is the greenest holiday of the year. We'll help you make it eco-friendly, too.
Valentine's Day round-up
February 12, 2009, 1:46 p.m.
Feb. 14 is just around the corner. Give this traditionally red day a hint of green with MNN's help.
Earth Day: At work
February 5, 2009, 5:32 p.m.
Celebrating Earth Day at work
Earth Day: At school
February 5, 2009, 5:16 p.m.
Celebrating Earth Day at school