In an effort to raise funds for clean water and improved sanitation for children in need, the UNICEF Tap Project offers a challenge.

For every 10 minutes you don't touch your phone, a UNICEF sponsor will fund one day of clean water for a needy child.

Visit uniceftapproject.org on your smartphone to take the challenge.

UNICEF also says that as little as a $1 donation can provide a 40-day supply of clean water, while a $5 donation can provide up to 200 days worth.

Visit unicefusa.org for more details.