Choose an overall theme for the boutique or a few themes that you can use in different sections of the boutique. For example, you might decorate half of the boutique in a way that appeals to girls and the other half that appeals more to boys.
Set up a mock bedroom or playroom to put each of your items in a larger context. In a single boy's room, you could advertise clothing, bed sheets and linens, a desk, toys, games, sports equipment and more. You could also put up wallpaper, poster, or framed pictures to make the room feel more like home.
Add spot lighting or music to your boutique. Spot lighting allows you to feature specific items in your boutique, especially larger, higher-price items. Your music should be fun but quiet and unobtrusive, so as not to bother the parents who are shopping with their children.