Space Invaders

Walking around some cities in Europe last winter made me realize that some of the streets had mosaics with little space invaders. If you look for them, you find them, and if you do not, you find them too. They are in the Raval in Barcelona, in Le Marais in Paris, in Australia, in Africa, in the US... they do not speak, but they are so funny and clever!
Here's the official web page: www.space-invaders.com