Legitimate question: When it comes to ball pits, jungle gyms and carousels, why should kids get to have all the fun? You work hard, right? Right. So, here are some places to play hard. Literally.
City Museum of St. Louis, MO
At St. Louis, Missouri's City Museum you'll find 600,000 square feet of salvaged materials, including two abandoned planes, that have been turned into a playground for adults. Take a ride down a 10-story slide, catch a pop-up circus, go for a spin on a Ferris wheel (on the roof!), wander through man-made caves and order bespoke shoelaces made on a sewing machine that dates back to the 1800s. Insider tip: The best time to visit is Friday or Saturday night, when the place is open only to adults.
Kaleidome Hong Kong
The rainbow-bright jungle gyms of yore have met their match in this laser-cut polyhedral dome, created for Hong Kong's Sha Tin Park by LAAB architects. The 10-and-under set loves crawling through the 262 cells of polished stainless steel, but don't let the kiddies stop you from scrambling to the top yourself — it's one hell of an Instagram souvenir.
SeaGlass Carousel, Battery Conservancy, New York
The 30 fiberglass fish on rotation in the new $16 million SeaGlass Carousel, which opened in August in New York's Battery Park, include crayola-bright threadfin butterflyfish and siamese fighting fish illuminated from the inside with color-changing LEDs meant to mimic bioluminescence. What else would you expect from the set designer of Broadway's Little Mermaid? You'll have to contend with lots of little people waiting in line to see the show, but it's worth it.