All bricks are blocks but definitely not vice-versa, and these certainly don’t have the dimensions or material of a standard brick.

I couldn’t find what they were made of but the material is quite white to allow for painting, and reasonably dense. The point is to buy one, paint/draw/spray your message on it and place it within the structure, so they are obviously weatherproof. The proceeds go to care for mentally disabled people.

I know, I think those people might actually be androids with screens for faces