In Luxembourg, if anyone cares to know, the normal price is 7.5 € (9 $) and the reduced one (for kids, students and over-65s) is 6€ (7.2 $). In England, in the cinema I use to go, normal 6.50£ (12$), kids 4£ (7.2 $), students and seniors 5£ (9$)
What does this tell us? Eeeerrmmm not much actually, just that I am too much obsessed with details...