For play time, the class of about 30 students was divided into five unisex groups. Each group took turns each day playing in different play areas: sandbox, toy blocks, art, play house, etc.
When it was my group's turn to play house, us boys played at being mommies, never daddies.
Some the male mommies donned frilly aprons and "cooked" in the play kitchen, while other male mommies tended to the babies ― bottle-feeding Betsy Wetsy dolls and changing their diapers after they wet. When Betsy was dry, male mommies could push their babies around the classroom in doll carriages.
In addition to the frilly aprons, there was a toy box containing pocketbooks, high heels, lady’s hats and adult-sized dresses. There were not enough items to completely outfit each mommy, so we would select just an item or two for our femulations. (I usually tried to get a pocketbook and a pair of heels.)
None of the male mommies, at least in my group, rebelled at being feminized and some of us really got into it by affecting “female” characteristics, such as speaking in a higher pitch and using female mannerisms.
Initially, I felt embarrassed playing a mommy, but it did not seem to bother the other boys, so I played along like a girl with the rest of the boys.
And so it goes.