Personalized Social Science Teacher Mom Baby Bib. This cute baby outfit for boys or girls says my Mommy is the worlds best social science teacher. Our Baby Bib is rated high in convenience and durability and with a variety of fashionable colors, your baby can be trendy. Mix and match to any outfit. 100% cotton ring spun combed heather colors are cotton-poly. Width 7.75", Length 11.75"