How do you make a cardboard sphere?

you take lengths of card (rectangles) and cut curves out of the corners (so almost ovals) then repeat and stick them together the best way you can Find a globe. Globes are commonly made of cardboard. The cardboard is cut so that when it is pressed into a mold with glue it forms a half-sphere. Two of these are then trimmed and glued together at the equator to form the globe.