MIKE SPRINGER/Gloucester Daily Times
Third grader Peter Shaw compares notes with a classmate while making a paper helicopter blade Tuesday during a visiting science program at Manchester Memorial School. Michael Bergman of Wenham brought his "Top Secret Science" program to the school under the sponsorship of the Manchester Memorial PTO Enrichment Committee and the Manchester Cultural Council. The topic Tuesday was engineering. Students took part in hands-on experiments to learn some of the most basic principles in physics.