I worked with my grandchildren from an early age. One, now at 14, has 3 bed quilts and sews with our wounded soldiers quilt group.
I started them on pillowcases, simple totes and then a simple block quilt.
For clothing, we started with pajamas. simple pull on pants and over the head top. Didnt matter if the seams were not perfect, they could wear them with pride.
another pair of pajamas they made with pull on pants, and a T-shirt from Joann's machine embroidered with a design that was in the print of the pants.