With her bright smile and Everygirl aura, Larisa Oleynik became the darling of the pre-teen set playing the title role in "The Secret World of Alex Mack" (Nickelodeon, 1994-98). Her character was a typical teenager on whom some experimental chemicals were spilled causing her to develop telekinetic powers and the ability to "morph" into objects. A quiet, almost unassuming series, "Alex Mack" was a twist on the long-time standard plot of a common person put in extraordinary circumstances, albeit at a younger age and with a charming sweetness. The series became Nickelodeon's most popular and when