The dress starts at the bottom with the skirt crochet in rounds.

The pattern includes pictures for crocheting the puff stitch.

FINISHED CHEST MEASUREMENTS 6-18 month: 22”
18 month-3 years: 24”
3-4 years: 26”
4-6 years: 28”
6-8 years: 30”

Note: The yarn is since May 29, 2012 available in my Ebay Store:
Hook & Needle Designs
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=19...

Substitute yarns:
Red Heart Luster Sheen
Premier Yarns Serenity Garden