I love the UNICEF USA Tap project.
It's a really simple idea. Brilliantly executed.
Tap water is free in all restaurants in the USA. The campaign encourages you to give $1 every time you are given free water.
$1 helps UNICEF provide water for 40 kids.
Simple ideas are so often the best. Take water, give water. Who wouldn't understand that!
If only that $1 was given by SMS!