This is a relatively easy and very kid friendly adorable costume for your baby's first or second Halloween. Knowing my daughter was comfy made me so happy to deck her out and show her off! Also, my daughter is now a skinny 3 years old and can actually still fit in this dress!
small amounts of black and white fleece (you could probably substitute felt also)
4 cloth pre-fold diapers (white)
1 white long sleeved onesie
1 pair white long pants
1 pair white socks
2 ouchless elastic hair bands (no metal parts)
approx. 2 feet of small black ric rac
(optional) approx. 2 feet of cloth covered flexible boning
Step 1: Building the dress
Lay out two of your cloth diapers. These will be one side of the dress (as in having an armhole). I couldn't tell a big enough difference in the fronts and backs of these for them to have a right / wrong side, so I don't think it matters which way you flip them. Fold the thinner sides to the inside of the diapers, laying them on top of the thicker middle sections.
Step 2: Shoulder seams
Now stack the diapers on top of each other and pick up both diapers, lining up the top edges so that your folded sides are on the outside. Using your white thread, hand sew or machine sew these four layers together. If you are hand sewing, I would use buttonhole twist or at least a heavy duty thread just to be secure. Sewing this creates the wrong side of the seam that sits on top of the shoulder. Repeat this step with the two remaining diapers. The last picture shows the right side of the finished shoulder seam.
*My red lines are purely illustrative and not meant to indicate the size of the thread or the stitches you should use.