When you have the bottom strip trimmed and curved (according to the previous step instructions) use a glue spreader to apply a small amount of glue to the tabbed edges of the box side. Set the center fold of the side strip at the top center point of the heart, and carefully run the side along the heart shaped guide mark on the box base, gluing the tabs in place as you go. When you get to the bottom point of the heart, go back and glue down the tabs for the other side of the box bottom.
To finish the side edges, glue the straight, non tabbed section of the box (the one you made by cutting off the tabs in the previous step) to the tabbed section which ends at the heart's bottom point. Run a glue spreader, a rounded toothpick or an embossing tool over the tabs on the inside of the box to make sure they are squarely glued to the bottom of the box. Set the box bottom aside to dry.
