In Japan, often there are words on the popsicle stick. It is like a game, you can win and lose but you won’t know until you have eating your popsicle. Here it says “あたり” (“atari”) which can be translated to “success”. Apparently, you can exchange your あたり stick for another free popsicle in the shop: https://hinative.com/questions/6863328 Sakurako got lucky!