Dress up your lil' man with out really dressing him up at all! I've stiched on a vest to the front of a onesie! The vest is attached at the shoulder neck area and on the sides under the arms. The main part of the vest has free movement. But dont worry, its not too long so baby can still crawl around without it interfering. Both the onesie and the vest fabric have been prewashed prior to assembling the finished product. I can make these in the following sizes from onesies I have on hand...

3-6mo
6-9 mo
12mo

Onesies are either Gerber brand or Carters brand