Some had doors that opened, some had bonnets with an engine underneath, once in a while the boot opened too, and just one or two had all three. They were the best ones. Most were modelled on real cars, but a few wacky designs were completely original, if often implausible.
I used to buy one from Egdell’s, the shop on the corner, every Saturday as soon as I got my pocket money. I eventually had 48, enough to fill the specially-designed case which I got for Christmas or my birthday one year.
One of the earliest Matchbox cars I had, when I was about five, ended up in the zebra enclosure at Edinburgh Zoo.