Catherine’s son Theo (Nicolina A. Akraboff ’07) tries to talk to Pippin (Benjamin Moncivaiz ’11) about his pet duck. The Musical Theatre Guild presents “Pippin” this Saturday, Dec. 1 at 8:00 p.m., this Sunday, Dec. 2 at 2:00 p.m. and Dec. 6–8 at 8 p.m. in La Sala de Puerto Rico.