1.Sufficient quantity: you will receive 100 pieces of reversible plates red and blue. Sufficient quantity means you can solve multiple math tasks or perform multiple math activities, suitable for interactive learning and playing in math class or at home. 2.Easy to carry: primary school calculator diameter 2.5 cm, thickness 0.3 cm. Suitable size, comfortable to hold and easy to store. Comes with two boxes, you can quickly organize and store it after each use. 3.HIGH QUALITY MATERIAL The set of plastic plate and plastic storage box is made of high quality material, durable and not easy to damage. It can withstand repeated use and provides students with a reliable tool for practicing math. 4.Widely Used The red and blue design of the math flipboard helps you learn math more intuitively, which not only improves the visualization of math concepts, but also increases your learning interest and interactive experience. Suitable for all kinds of math activities in primary school, supports visual and practical learning.