I found this cute onesie at Walmart. I love the sentiment for my friend who is going to have a baby girl any day now!
It was a 20 minute project to add the skirt to the onesie. I just used 1 layer of taffeta and 3 layers of tulle. They were all 42x8 inches. I cut the onesie apart at the waist, then gathered the skirt pieces and stitched them to the onesie with a stretch stitch. The pantie part went right back on.
I think having the snaps there will keep the dress neat. I hope she likes it!