This idea comes from our friend Rachel Huntington of Bonjour Fete. Her haunted piano balloon installation appeared at a Halloween dinner party. For this project, we recommend using various sizes of balloons ranging between 5 to 16 inches. To make the garland, you will use approximately 8 to 10 small balloons per foot. Here, we used approximately 250 balloons. Good quality balloons should last a couple of weeks if kept in a temperature controlled environment. This tutorial can be applied to highlight a cake table, use as a runner, or as an archway.