.The design is novel and creative Use solar power to generate electricity and be green. Simple assembly, delivery of color graphic printing instructions. After the installation is complete, you can test it in direct sunlight, without the need for a battery, as long as the sun is strong enough, you can run all the time. Funny and could exercise children's hands-on assembly ability, develop intelligence, stimulate learning interest Tips: Please do not test indoors or energy-saving lamps, could test in the bath or high-power incandescent lamp Suitable for people over 3 years old. It is a good puzzle toy to exercise practical ability