Personalized Farmer Tractor EIEIO Big Sis Toddler Dress. Toddler Dress - Heather with cute farmer girl in overalls riding a red tractor with a cow, pig and chicken graphic says BIG SIS-I-E-I-O. EIEIO! Cute farm theme Old MacDonald sister gift. Your little one will be adorable and comfortable in this 100% combed ringspun cotton 1x1 baby rib dress!