Create two rooms within a room by installing either a low wall or low bookcase through the room's middle. Screens and even hanging, potted plants make low-key room dividers. A tiered bench with cubbyholes will offer room division as well as a place to put personal belongings. Even though your children will be able to see each other through these room dividers, they help to make the room seem private.
Allow your children to choose their favorite paint colors. Paint the room in halves with each half geared toward the individual child. If your children cannot agree on the room’s color scheme, choose middle-ground colors yourself. Middle-ground colors are shades similar to the ones they chose. If you decide on the colors, this might quell any sibling animosity.
Allow children to customize plain wooden furniture for their side of the room. Smaller-scale furniture with simple lines works well in most shared bedrooms. Giving your children the ability to change the color or painted designs of their own furniture makes them feel in control of their shared space. Painting furniture with chalkboard paint will allow your kids to draw whatever they want, whenever they want.
Paint chalkboard paint on one wall, extending it into both sides of the room. Tell your children to write their feelings on the wall so the other sibling can see. This way, if one child is feeling badly toward the other, she can communicate without having a verbal confrontation. The wall is also a good place to share art, poetry and short stories.