I use simple balls to cut in half to make igloo and snowman. Also, I make some black points to present the shadow.
When I think of circles, I would think of ice cream and balloons first. I use black balls to make some of them much stand out and some black circles to make decorations and shadow.
These are two of my works which can see I only put the white balls on some important part, like the dinosaur’s head and legs, to make them to be more obvious.