Environmentally friendly solar technology which works also in the dark. Contains crystalline solar module (3.0V/240mA), gold capacitor (2.3V/10F) to store the sun energy, a bell-type armature gear motor which has a very soft start (as low as 0.2V) and the solar switch as the control center for the solar components. Detailed experiment and assembly manual for 8 models. More than 300 parts. From 9 years onwards.