Boys and girls both used to play with hoops, but they had different types.
The boys had iron hoops. They would start the hoops with their hands then run with them, using a sort of large hook to keep the hoops trundling along. The photos show the hooks, but unfortunately none are as clear as they might be.
You have to look quite carefully into the photo on the right to see the hook, but it is there if you look closely.
The first of the next photos shows an iron hoop hanging up in a museum, but it is unfortunately partially obscured by wooden stilts.
The second photo has the handle cropped away.
The third photo shows two hoops but unfortunately a rope and curtains detract from the hoops.
For girls there were wooden hoops in various sizes. We just called them hoops but I understand that their full name was hula hoops.
The girls placed the hoops round their waists and rotate the lower parts of their bodies to keep the hoops going. The winner was the girl who kept her hoop going longest.
The girls would also use their hands or sticks to beat the hoops along the pavement, with whoever kept the hoops going furthest being the winner.
The difference between the old wooden hoops and the ones available today is their weight. The modern ones are light and it is almost impossible to keep them going round the waist.