We don't care if they're only 16. We don't care if they were born in this millennium. They know about Star Wars. They will get the joke. If they don't then PLEASE educate them. (The card also manages to incorporate Star Wars with cute dogs so there's literally nothing to hate) Message inside reads Happy birthday!" Card measures (approx.) 150 x 150 mm Suitable for letter post Printed on FSC approved materials Unsuitable for children under 3 years old"