1st Birthday Boy Party Balloon Centerpiece Kit. One 1st Birthday Boy Party Balloon Centerpiece Kit contains 1 star shaped 18 inch 1st Birthday balloon, one styrofoam base with blue metallic fringe, and 3 - 5 inch blue star balloons. Kit also contains straw sticks to inflate and then hold up your air-filled balloons on the base. No helium needed. A great new party decoration idea!