It's Elementary® Periodic Table Soap Grab 'n Go Minis are a miniature version of our larger soap & a hit with our museum customers, science halls, hospital gift shops & college bookstores! Great stocking stuffer for the science enthusiast! Each soap measures 2”x 2” is lightly scented with our gender neutral ginger lime fragrance & made from our high quality hypoallergenic glycerin soap & then shrink wrapped & labelled to preserve quality. The image is printed on a special paper that is embedded into the soap & dissolves along with the soap. "Radioactive" Elements Glow in the dark by simply exposing them to light or sunlight for a few minutes then placing them in a dark room. Thirteen elements glow in the dark! Um (the element of confusion) & Ah (the element of surprise) offer a little added humor to the line! Choose from 47 different elements OR ask us for one you would like! As with all of our soaps these are individually handcrafted, hypoallergenic & certified cruelty free!