Ever since the World Cup had started, our five-year-old has been completely obsessed with country flags. So I built him a small app to practice.The first version was a 5-minute hack with Claude on my phone. Then came his feature requests (“I want Lamine Yamal to congratulate me when I get it right!”) — that paired well with my fascination for building browser games. And I realised that there’s an interesting UX challenge here: How do you design an interface for someone who can’t read yet?So the one-off turned into a real game, which I’m now happy to share with others, beyond my initial target audience of one.