Northside PTO in Sandpoint, Idaho, got teachers back into the swing of school with a fun first-day treat: A package of chewing gum was placed in each staffer’s mailbox with the message “WelGUM back!” on the front. “I simply printed a 2-inch-by-4-inch label and placed it on each package of gum,” says president Christa Finney. “The teachers and staff loved them.”