Hi.
Check out www.freerice.com
It is a vocabulary game but a bit different than other games. Every time you find a right answer you give 10 granes of rice to hungry people. 10 granes might sound very little but when a lot of people keep playing this ammount could be a lot.
And if you don't know the answer just guess one of the 4 possible answers. You might get it right. If you answer correctly a few times the level goes higher but if you answer wrong the oposite happens. The game is very accessible so check it out.
Nikos
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