This intriguing and easily constructed model incorporates SMA wire that controls the "flapping" of the light weight Mylar wings as its length changes with temperature. Two AA batteries provide the pulses of electrical energy that cyclically heat the wire.. Yous can adjust settings to vary the speed up to 36 beats per minute.  

The kit includes a printed circuit board, parts and detailed instructions. It is suitable as an introductory electronics kit for students aged 14 and over. You will need to provide solder and a soldering iron, a screwdriver, wire cutters and two AA batteries.

G81.10 Solar Space Wings Kit

The electronic butterfly that is powered by the sun! Solar energy (or another light source) is collected by the solar panel and released as electrical energy that is channelled through an SMA wire, causing it to heat up and contract. As the current pulses, the temperature fluctuates and the wings "flap" up to 15 times per minute, depending on the light level.

The kit includes a solar cell,  printed circuit board, parts and detailed instructions. It is suitable as an introductory electronics kit for students aged 14 and over. You will need to provide solder and a soldering iron, a screwdriver and wire cutters.