Tie ribbons and bows to the top or use as weights for helium balloons. If there is a prominent window where the party will be fill clear bottles with water and add drops of food color to tint the water, you can make pastels or primaries in what ever color you like. Place them in the window to catch the sun for a pretty decoration. Make more lollipops in different sizes, stick into Styrofoam in a big colorful bowl for a centerpiece. Cover the Styrofoam with small wrapped candy.
Storks Use stork signs to point the way to the shower.
Make a stork centerpiece. If you can't find a plastic stork, take a plastic flamingo, spray paint it white. Make a stork beak from yellow cardstock and hot glue on. Attach a diaper sling and a baby doll. Make a base for him to stand in with a pretty planter, bowl, diaper pail, etc.