As for the movable toys for children, they are mainly powered by batteries or winding springs. The spring-powered toy is more environmental-friendly, but it will only move after being wound up. While for the battery-powered ones, the batteries need to be replaced once run out, which is either not eco-friendly or not convenient. Solar energy, a kind of clean and non-polluting energy source, has been applied in many areas. And the toy introduced today also uses solar technology. This solar butterfly will move when exposed to sunlight, but it remains unknown whether it can fly or not. If this kind of toy could fly in the future, it would be very interesting. So fascinating a solar butterfly is now priced at 14 pounds.