Spray adhesive onto paper heart and strips; press onto top of the box lid and outer sides of the lid. Measure and cut out dividers from posterboard, or use smaller heart boxes (as shown below, and on page 8 and page 17, top right), trimming the base of each so it's the same height as the larger one. Paint dividers or smaller boxes; let dry completely. With hot-glue gun, stick dividers or smaller boxes in box. Assemble paper bow for lid.