smart electronic kit (upgraded) consists of standard items : 2x short connectors, 2 x medium connectors, 1x motor, 1x propeller, 1xLED, 1X on-off toggle switch, 1x touch switch, 1x light bulb, 1x light bulb holder. The extra items are 2x long connectors, 2x light bulb and 2x bulb holders. This set is easy to connect for student to understand basic electrical circuit.