I love Free Rice. Maybe it's because I achieved the maximum score of 50 and gave 570 grains of rice to UNICEF.
When I think about it, 570 grains is a pittance, but I loved playing the game. It filled me with nerdy joy, and I even learned a couple words too. I believe this is the first time my large vocabulary has directly resulted in doing good. I'm working on doing it both more indirectly, but today with both kids home from school on holiday is not a writing day for me.