To commemorate the fifth anniversary of Global Handwashing Day, Kimberly-Clark and The Healthy Workplace Project have organized a 30-day challenge that will result in a $25,000 donation to the U.S. Fund for UNICEF. From now until Nov. 15, you can take The Global Handwashing Day Challenge, a brief online quiz that covers key health and hygiene issues. Regardless of whether the questions are answered correctly, anyone who participates can choose one of the following projects to benefit from the donation: Bringing Clean Water Kits to Families in Emergencies; Improving Water, Sanitation and Hygiene in Haiti’s schools; and Improving Community Hygiene in Africa. After the challenge ends, $25,000 will be given to the project that receives the most votes. For information, click here.