The cast of "Mary Poppins Jr." sings "Supercalifragilisticexpialidocious" during rehearsals Tuesday in the Coldwater Auditeria. Coldwater Middle School students will present the musical at 7 p.m. today, 2 p.m. and 7 p.m. Saturday and at 2 p.m. Sunday in the Coldwater Auditeria. Tickets are available at the door for $7.