A little girl's bedroom can feel sweet without requiring you to replace half of it when she suddenly decides she's much too old for little-girl things. Soft blue pinstripe, painted furniture, natural rattan, touches of green, and a classic upholstered bed create a girls' bedroom designed to grow right along with her.

A navy upholstered bed may be one of the smartest decorating decisions you can make in a boy's bedroom. Powder blue furniture, classic stripes, woven texture, warm brass, and personalized details create a preppy boys room with plenty of personality—and plenty of room to grow.

The easiest way to make a little girl's bedroom last is to put the sweetness in the things you can change. Soft blue walls, blush gingham bedding, a classic white spindle bed, warm brass, and natural rattan create a charming girls' bedroom with plenty of room to grow.

Grandmillennial style does not require putting a floral pattern on every available surface. Soft floral wallpaper, classic white furniture, ruffled details, warm brass, and touches of sage create a girls' bedroom that feels sweet, collected, and timeless without trying too hard.

A coastal boy's bedroom needs exactly one sailboat. Soft blue walls, crisp white furniture, natural wood, relaxed bedding, and one vintage sailboat print create a coastal kids room that feels playful now without turning the entire space into a nautical theme.

Pink is considerably easier to live with when you put it on something you can change in an afternoon. A classic white spindle bed, blush bedding, warm brass, woven storage, and timeless furniture create a sweet girls' bedroom that can easily grow right along with her.

A window seat may be one of the nicest ways to use space that otherwise wouldn't be doing much of anything. Floral wallpaper, painted paneling, soft blue upholstery, layered patterns, and warm brass create a girls' bedroom that feels sweet and collected with plenty of room to grow.

One dark piece can completely change a light room without making the whole space feel dark. A navy upholstered bed, pale oak furniture, geometric wallpaper, plaid drapery, warm leather, and natural texture create a boys bedroom that feels a little more grown up without growing up too fast.

If you want to use a color you love without asking the entire room to commit to it, drapery is one of my favorite places to start. Pink Lemonade curtains, soft blue florals, touches of green, warm burl wood, brass, and natural texture create a girls bedroom that feels sweet, layered, and easy to grow with.