The most important about kids clothes is, the kids aren’t sweating and cooling down suddenly. So I choose sweatshirt jersey and a light wool knit for the bloomers and the top.
The shirt had an applique with my daughter’s name. I just fixed it with a very wide and simple zigag.
The bloomers have an elastic tape on the top ad the bottom is finished with a bias tape. DEpending on the cut of the bloomer, an elastic tape can be sewn in.