But did '50s children differ very much from '30s children in dress?
I'm sure I was dressed in the same sorts of clothes as Mother wore when she was small.

Well... until bri-nylon came in and shocked us all. Literally. At least it was a warning to get away before you were doubly affronted by the BO it caused!
I do not remember mica being used as glitter. It was always the square bits of stuff that got everywhere every year.