From a 1928 Singer sewing guide published in Great Britain.
DO NOT OVERTRIM
The keynote of children’s dress should be simplicity, and as a guide for trimming a girl’s frock, if the bodice is embroidered or trimmed with lace, let the skirt be plain, beyond perhaps a few tucks above the hem. A pleated skirt should have a plain little bodice, with only neck and edge of sleeve bindings for trimmings. Flower designs and printed fabrics need very little trimming and if a bias binding be used it should be of a plain coloured material to match the ground or one prominent colour in the design.
Some ideas never change. (Thanks to April for sharing this.)