‘It’s a tiny bit of joy!’ How trinket swapping is making the world a happier place, one china sheep at a time

Trinket exchange boxes, where people swap small items like pins, stickers, and ceramic animals, are rapidly spreading across the UK and US. The phenomenon, which began in Philadelphia in autumn 2024, has grown from 800 to nearly 1,500 installations in two months, according to Portland-based artist Rachael Harms Mahlandt, who tracks them on a world map. In Edinburgh, pet-sitter Sam Stevens runs a popular pink box outside Argonaut Books, inspired by a San Francisco exchange, and has seen her follower count jump overnight as locals trade trinkets for fun.