Meaning arises out of the context of its relation to other things. How simply this children's card game highlights this idea. Bruno Murani's 'Plus/Minus' consists of 72 images/cards. The transparent background allows the cards to be stacked to create more complex landscapes. A tree is just a tree, but here we see how its relation to other objects changes our perception of it. This card game is both design worthy and oddly philisophical. I forsee endless hours of creative playing (adults and children alike).