Ball pits are having something of a moment. (Well, one ball pit is, but we can only hope it leads to bigger things.) But not to be outdone, there's a French artist named Charles Pétillon who is going around filling spaces with white balloons. And so, the battle of our time to be the Preeminent Child's Toy Stripped of Color and Repurposed Into Art Installations has begun. The balloons have the advantage of floating on the ceiling, being more malleable in terms of placement, and looking more design-y overall. The ball pits have the advantage of you can play in them.