It's tricky to configure the placement of the pompoms when they're adhered to the wreath, so it's best to figure out how you want to order them before you place them. It's important to configure the design of the pompoms in a cohesive way that looks good size and color-wise.
This project is scalable by design and can be undertaken with humbler materials and still accomplish the same effect. The size of the wreath obviously influences the total time needed to complete it—the above project should take four to eight hours depending on how fast you can make the pompoms. You might find it beneficial to glue pins, as this will keep the pompoms from shifting if you hang it outside. For further information on this project or clarity of steps, feel free to contact me at http://www.yokoo.us.