Personalized Happy 100 Days Of First Grade Baby Bodysuit. The Happy 100 Days Of First Grade design is specifically made for 1st-grade students, adding an extra touch of joy and pride to their big day. With its vibrant colors and adorable illustration, this design is sure to bring a smile to everyone's face. Our one piece baby bodysuit make great gift for newborns, babies, infants, baby showers and expectant moms. An ideal gift for any new parent who will want one in every color.