According to this account in the Georgetown Times:
Brian Benson, an eighth-grade student who won first place in the Life Science/Biology category for his project “Creation Wins!!!,” says he disproved part of the theory of evolution. Using a rolled-up paper towel suspended between two glasses of water with Epsom Salts, the paper towel formed stalactites. He states that the theory that they take millions of years to develop is incorrect.
“Scientists say it takes millions of years to form stalactites,” Benson said. “However, in only a couple of hours, I have formed stalactites just by using paper towel and Epsom Salts.”