Abstract: A light string includes a plurality of remote units and a control unit. Each of the plurality of remote units includes a microcontroller and is connected to a plurality of lights. Each microcontroller stores one or more programs for controlling the lights in the plurality of lights. The control unit is connected to the plurality of remote units by a power supply line. The control unit sends information via the power supply line to the plurality of remote units. The information indicates a program of the one or more programs to be executed by the microcontroller of each of the remote units to individually control the plurality of lights.

Abstract: A greeting card having a first card panel, a door connected to the first card panel and movable between a closed position where the door substantially covers a section of the first card panel and an open position where the door uncovers the section of the first card panel. A trigger is provided which is movable between a first position wherein the door is prevented from moving, and a second position wherein the door is allowed to move between the closed and open positions. A member which is movable by a user controls operation of the trigger to move the trigger to the second position to allow the door to move to the open position.