A instructor (2nd L) from the Philippine Mermaid Swimming Academy assists participants of a monofin swimming summer workshop as they practise floating in the water of a private pool in Paranaque city, metro Manila April 5, 2014. The Philippine Mermaid Swimming Academy workshops, which were originally conducted on the beaches of Boracay Island, central Philippines, currently cost 1,800 pesos per person ($40) for a two-hour session. (Photo by Romeo Ranoco/Reuters)

Last weekend, the National Building Museum in Washington, D.C., opened a 10,000 square-foot ball pit to the general public, and everyone cheered that, finally, someone made their childhood dreams come true.

A shoebill is displayed at Ueno Zoo in Tokyo August 28, 2012. (Photo by Itsuo Inouye/Associated Press)

People are seen watching hot air balloons fly overhead during a two-day international hot air balloon festival in Eshkol Park near the southern city of Netivot, Israel July 22, 2016. (Photo by Amir Cohen/Reuters)

A hot air balloon competition called “Grudziadzkie Zawody Balonowe” is held in Lisie Katy, central-northern Poland, 14 May 2021. The compe​tition is held for the eighteenth time. (Photo by Tytus Zmijewski/EPA/EFE)

Hot-air balloons fly over Metropolitano park during the International Hot-Air Balloon Festival in Leon, state of Guanajuato, Mexico on November 19, 2023. (Photo by Henry Romero/Reuters)

This view shows giant hot air balloons of various shapes being lifted to begin flights from the Metropolitan Park over the city of Leon during the 2025 International Balloon Festival (FIG) in the state of Guanajuato, Mexico on November 15, 2025. (Photo by Mario Armas/AFP Photo)

Hot air balloons in flight over Melbourne, Australia on January 24, 2022. (Photo by Rex Features/Shutterstock)