Four adult actors in Rubicon Theatre Project's production are convincing and funny as "gifted" nine-year-olds enrolled in a program intended to stimulate budding geniuses. They also persuasively represent the quartet's maturation over the three-year period covered by Liza Lentini's script: there are plenty of laughs in this flashback to the early 80s encapsulating pivotal moments of preadolescent angst. But Michael Gillett's dull delivery of the school board's perspective in the show's narration undermines the satire, and Kassi Dallmann's 90-minute staging can feel slow and cramped. A report card on Rubicon's efforts would have to note that the production isn't reaching its full potential, though the starring foursome and an uncredited costume designer deserve an A. Through 4/29: Thu-Sat 8 PM, Apollo Theater, studio, 2540 N. Lincoln, 773-935-6100, $20-$25, industry nights Thu.