Excerpts from a handmade toddler's raglan sleeve dress
After this I attached the arms to either side of the bodice - and then also to the back pieces. I didn't catch pictures of these steps. Next is to spread out the neckline and trace a facing for the entire neckline and back zipper area. Zigzag along the bottom edge of the facing to keep it from unraveling, then attach the facing, right sides together, to the bodice of the dress.
I like the raglan sleeve pattern because it can be sewn all the way down the sleeve from wrist to the bottom of the skirt. Just be sure to clip out the armpit with the pinking shears before zig-zagging over the seam.
After all of that - it is just putting in the back zipper, hemming the sleeves and the bottom skirt.
More complete instructions, with pictures of every step - can be found at my BurdaStyle project page : http://www.burdastyle.com/projects/raglan-sleeved-toddler-dress