DescriptionThis item is a color filter board, which is a good tool for teaching. Made of material for long time using. It is lightweight and small, so it's convenient to storage. These filter boards can be combined to create different effects, such as, cool effects, color correcting.Features- Color: As shown - Material: Paper - Size: About 13.00X6.00X0.10cm/5.11X2.36X0.04inch - This item is a color filter board, which is a good tool for color teaching. - This color mixing toy is made from premium material, durable to use. - Exploring property of optics and color, early physics optical science educational toy. - It helps children learn the color of different colors combination. - It is lightweight and small size, so it's convenient to storage when not i play.