|This economical seven-piece kit lets you demonstrate the
conversion between different forms of energy. It includes four
devices for generating electrical energy from mechanical motion
(hand generator), chemical energy (batteries), light (solar cell)
and wind (windmill), and three devices for using electrical energy
to generate light (LED), motion (motor) and sound (buzzer). A set
of cables is included for connecting the devices to each other in
Also includes an activity guide.