Assemble the components without soldering and discover 6 activities to make your own alarm. Real components are included in the box (photosensitive sensor, buzzer, transistors etc) Features: 1 console, 1 perforated cardboard, 7 red wires, 7 white wires, 20 springs, 1 battery compartment, 1 buzzer, 1 light-emitting diode (LED), 1 NPN transistor, 1 PNP transistor, 1 capacitor, 1 photosensitive sensor and 1 support, 2 resistors. Only for children of 8 years and older. Box dimensions 20.00 x 05.00 x 25.00 cm Only for children 8 years and older. WARNING! Not suitable for children under 36 months. Presence of small elements likely to be ingested. Danger of suffocation. Colors and content may vary slightly. Requires 2 LR06-AA batteries not included. The installation of the batteries must be carried out by an adult. At the end of their life, the batteries must be disposed of safely. Place them in a collection bin. Instructions for parents are attached and must be followed. Activity 6 requires a string (not included).