Just such a project is [Radomir Dopieralski’s] set of wearable mechatronic cat ears. A cosplay accessory that moves as you do. Very kawaii, but fun. You may have seen the commercially available ...

While the president didn't wear a costume, Dr. Biden dressed as the couple's pet, Willow the cat, with a gray dress, cat ears, a nose and whiskers, and a tail. Celal Gunes/Anadolu via Getty ...