Personalized Heart Chemical Elements Baby Bib. A heart filled with chemical elements and their symbols is a unique chemistry design for science school teachers, students, chemists and chemical engineers. 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"