Five giant silver spheres swing above, echoing Newton's cradle in a hypnotic rhythm.
"It is forbidden not to touch", says Roberto Fantauzzi, founder of the Balloon Museum, who set up the Euphoria exhibition.
The exhibition is playful yet precise: black bin bags breathe on the walls, a bed slowly inhales and exhales, and a glass house fills with blue balloons.
Japanese-British duo A.A. Murakami's tree drops smoke-filled bubbles, while the finale plunges guests into two million black balls.
After four years of renovation, the Grand Palais doesn’t just reopen, it breathes again.