I never thought science and soap could be a good combination until I saw Uranium Soap. Uranium Soap is modeled after Uranium's place on the periodic table and glows-in-the-dark just like the real thing.
Fortunately, unlike the real thing, this soap won't threaten your health and well-being. Uranium Soap makes the perfect holiday gift for the science guy/girl in your life that thinks they have everything. Maybe you could even accessorize with electronic microscopes and petri dishes.