Karla Kunk, who plays Mary Poppins, sings "A Spoonful of Sugar" with Jane and Michael Banks, played by Eve Lisi and Rudi Gross, Tuesday during rehearsal for "Mary Poppins Jr." 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.