Unicorn Fantasy Party Balloon Centerpiece Kit. One Unicorn Fantasy Party Balloon Centerpiece Kit contains 1 round shaped 18 inch racing foil balloon, one styrofoam base with pink metallic fringe, and 3 - 5 inch pink 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!