Argentinian artist Tomás Saraceno studied at NASA's International Space University, among other places, and the influence shows. One of the coolest things about Cloud City is imagining all the things it could be: an international space station, an invisible fortress in the clouds, a bubble explorer pod in a bubble bath battlefield. (Can you imagine having this in your backyard? Okay, I'm a New Yorker. I can barely imagine having a backyard.)

Children must be at least 10-years-old and 48-inches tall to climb on the sculpture, but anyone can view it from the roof deck. There are lots of other rules that apply to everyone so you should definitely read them all on the Met's website before visiting.

Cloud City is on view through November 4 at the Metropolitan Museum of Art, located at Fifth Avenue and 82nd Street. The exhibit is free with suggested admission: $25 for adults, free for children under 12. Timed-entry tickets are distributed in person at the museum and I suspect there will be lines at peak times at least, if not always.

Read about other cool exhibits for kids in our Museum Guide.