Paul Zindel’s Pulitzer Prize-winning play tells the story of Tillie, a bright young girl in 1970s America whose mother is mentally ill. As she works on the eponymous research, she and her disabled sister Ruth discover that sometimes, the only person you can count on is yourself. A classic story of discovery, love, family and the harm parents can inflict on their children. Jan. 28-Feb. 1, Loft Theatre, University Theatre Building http://www.colorado.edu/theatredance/events-tickets/theatre-events/effe…