The key to this soiree is simplicity so all you need to decorate the sibling shower digs is some helium balloons and a sharpie marker. Make baby face balloons by drawing fun lil expressions — sleeping babe, pacifier sucking tot and yawning youngster — what ever comes to mind, on balloons of your kiddo's favorite colors. If the guests are old enough, design a few and then let the tots go wild decorating their own with washable markers. Ask the children to doodle up what they envision the baby looking like or their own smaller sibling. Tie the baby face balloons off in bundles or let them roam freely around the room for the wee one's to bat at.