S.V.
My friend did this for my shower, they came out totally cute. They bought several sizes in the onesies so my little man wore them till he was about a year. They used fabric paint-only problem is they didnt wash very well, and when people used alot of paint, you could feel the paint through the onesies so he wasn't able to wear those. They also used stampers and those came out cute as well.
S.