Clear physics teaching tool that demonstrates in a straightforward way how sunlight is converted to energy. Supports science understanding of solar energy and energy transfer. Promotes curiosity and creative thinking. Encourages observation, problem solving, and experimentation as children explore how light drives motion. Visual demonstration: when placed in direct sunlight, the radiometer vanes rotate, providing a real time, tangible example of energy conversion. Versatile gift option: a thoughtful and creative present for students, teachers, and families who enjoy science and learning at home or in the classroom. Material and handling: glass construction and a fragile design. Suitable for ages 14 and up. Handle with care. Practical guidance: place the radiometer in direct sunlight on a stable surface to observe movement. Not intended for use with artificial light as a substitute for sunlight. Use scenarios Classroom demonstration: use during a lesson on solar energy and energy transfer to show how light becomes motion, reinforcing key concepts with a live example. Home learning activity: place on a sunny windowsill or outdoor area to observe how sunlight affects the vanes and to explore variations with different sun exposure. Gift use: give to a teen, student, or scienceminded family member as an educational and engaging gift that supports curiosity and exploration.