Choose pacific colors like blue and green. "Light blue encourages sleep by producing a calming effect," says Anna Starmer, color and trend consultant and author of The Color Scheme Bible. "Green provides a refreshing and serene environment, helping her to feel secure, comfortable and connected with nature." Behr's Premium Plus Interior flat enamel paint in Tropical Breeze is a soft blue for both girls and boys ($17; homedepot.com).
Not only do plants make beautiful décor, certain types remove up to 87 percent of air pollutants in your home within 24 hours, according to a study conducted by NASA. One of the most effective (and stylish) air-purifying plants is the peace lily. ($30; proflowers.com)
Pendant lamps are an innovative and modern way to light your child's space. Hung over the crib, they also serve as a chic and fascinating mobile. Oilo's cylinder lights come in a stylish array of shade options, like the lamps shown above ($150; oilostudio.com).
To add a touch of whimsy to the tranquil motif, use graphic, childlike art on the walls. If you don't want to make a permanent investment, use vinyl appliqués in lieu of framed art or murals. Target's simple peel-and-stick 2 Girls large wall decals are a fun option ($80; target.com).