The most important thing you can do when creating a shadow box happens before you even begin arranging anything. In order to get the best results, you’ll want to come up with a theme—and stick to it. Whether you’re focusing on sports achievements, memorable trips, or a new baby, the key to success is consistency. Within your theme, items can differ from one another (for example, it’s fine to pair an old passport with photographs from your walk through Paris). But try to avoid putting your child’s first report card with those photographs from the Eiffel Tower—instead, pair it with a drawing your son made in class that year.