Would you like a way for your children to learn and to donate to a good cause at the same time?  Free Rice does just that.  You can go to the Free Rice website and answer questions from various subjects, including art, english, math and others.  For each correct answer, 10 grains of rice will be donated to hungry people all over the world through the UN World Food Program.  Just playing on here for 15 minutes could add up to a lot of rice!  This is awesome for the kids, but I had a lot of fun playing on there myself!