This toy can be assembled into solar airboat, windmill, puppy, car, plane, revolving plane & contains a total of 22 parts. It's not the kind of blankly building blocks, they will move. Sunlight shine solar panels, provide small toys with endless power. The toys can give full play and nurture children's imagination, creativity. It does not require screws to connect, just a simple assembly can be completed so that children can learn to enjoy yourself to bring sense of  accomplishment. For younger children, its operation more convenient and safer.