I just love ending a photo shoot with kids playing dress up. How cute!A new catalog called Chasing Fireflies has adorable clothes and costumes for kids girls and boys. They also have great T-shirts with numbers on them for different ages and I've also photographed a family before with the "big/little sister/brother" T-shirts that they sell. A few other GREAT resources that I love are Posh Tots and Koo Koo Bear Kids.
Check them out, then call me to set up a shoot! :0)