A Paint Color for Sweet Dreams

For a less dreary feel, the organizers painted the walls lavender (Lavender Mist, $41 a gallon, www.benjaminmoore.com for stores), “which has a soothing quality that’s excellent for sleep,” says Leatrice Eiseman, director of the Pantone Color Institute. A soft wool rug (8 by 10 feet, $599, www.potterybarnkids.com) replaced a rough carpet, so the girls can comfortably play on the floor.

Standout Accessories

The Rockin’ Alarm Clock ($129, www.pbteen.com) is an iPod dock and a speaker in one. It can wake up the girls or inspire a dance party. Clip-on task lamps ($39 each, www.pbteen.com) offer bedtime reading light that won’t disturb a sleeping sister.

Storage within Arm’s Reach

An iconic nightstand with two compartments (Componibili Round Tower, $120, www.kartell.com) gives the room a modern touch and makes sharing a breeze. The orange Candella Tooli night-light ($40 for two, www.oxo.com) glows softly while children sleep and can be used as a flashlight for a nighttime bathroom run.

A Bright Spot Overhead

A nonworking ceiling fan was removed to clear the way for the Chalet Chandelier in sunny yellow ($199, www.pbteen.com), designed to look grown-up but scaled for kids’ rooms. It offers functional overhead lighting and makes the room feel more dressed up. Rounded bulbs add some interesting flair.

Beds that Grow with Them

Old bunk beds were replaced with a set that can be converted to stand-alone beds for Molly (bottom) and June (top). (Catalina Bunk Bed, $1,049 as shown, www.potterybarnkids.com.) Coordinated bedding blends together but gives each girl her own look. (Big Lilac and Bulb bedding, assorted prices, www.arealinenshop.com.)