Personalized Radioactive Tree Circle Baby Bib. A tree made of radioactive symbols with a red and yellow glow in a colorful circle is a humorous Christmas design. Fun holiday gifts for college students, physicists, nuclear engineers and workers. 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"