Ze Frank

You have probably seen this website before... but if you haven't! Here it is http://www.zefrank.com/. Full of cool games and ideas. 

One of my favorite projects is the "Earth Sandwich" project. There is a tool on ze frank that shows you the location exactly opposite to you, if you find someone willing to make an earth sandwich with you, you place a piece of bread on the ground while the person on the opposite side of the earth does the same, creating an earth sandwich!!