I was thinking the other day, about some school shoes I used to have, they were black leather with a buckle and with them came a gold plastic key, and you could use the key to turn a picture that showed in the sole of the shoe. Maybe it was a flower?
And can I find a photo of them? I cannot, just 80s white shoes, these were definitely a 90s pair. All the girls used to wear their keys round their necks. Google, you have failed me.