I recall in the infants, where sexes were mixed, small girls were always doing handstands against the wall and the boys all used to stand and watch the display of knickers as the girls skirts dropped over their heads to reveal all beneath.
Thence to "Big Skool" and from the age of 6 no more knicker displays as I went to All Boys Skools from then on ..... so lots of footy in the playground during the winter and cricket in the summer. The variations were the Conker Season for October and the Marble Season, which if memory serves, filled the gap between Footy and Cricket so must have been about Easter. The girls, who now had a separate building and playground, moved on from handstands to skipping or "Jacks" although we called 'em "Dibs" and endless complaining about boys watching them from the other playground.