Free Rice

Check this one out! FreeRice.com

You play a game and the site donates rice to the needy for every correct answer you submit.

Here's an example of one of the words I was given: stentorian

See how good you are or do like I did and cheat by opening another browser and looking up the definition on M-W.com.

Don't think that just because you donated 100 grains of rice you "did your part" :-)

Our little planet

This website is pretty cool. It shows the size of our planet relative to other planets and stars.

techdo.com