Features: Develop their ability of hand on, and improve train observation, thinking and analytical skills. Size: about 29x8.5x13cm/11.42x3.35x5.12in, will not take up too much space. Explore and understand the fundamental principles of physics mechanics and friction with physics teaching aids. Adjustable slope board can cause children's curiosity, become the parents of the education of children's helpers. Perfect for classrooms, school programs, libraries, birthdays, and stem-loving families, fostering teamwork and collaborative learning. Specifications: Component: Plastic Size: about 29x8.5x13cm/11.42x3.35x5.12'' Package Includes: 1 Pc Slope Board note: Please allow 1-3cm errors due to manual measurement. Due to the difference betweeen different monitors,the picture may not reflect the actual color of the item.