Use sealed glass,resin, colorless liquid, special sand and appropriate amount of bubbles to create the perfect picture, Each flip can produce a completely non-repetitive dynamic painting,so that you can not bear to release it.It's benefit for the development of intelligence, improve the sentiment. Carefully screened colorful sand and levels clearly demarcated, flow out excellent 3D effect patterns. Using new resin frame, strong and durable, fresh and simple, beautiful and generous.Can effectively play the anti-fall or anti-pressure function.The appearance of high-end fashion, by a variety of consumers favor, the same more suitable for children play. Continuous flow of sand painting, can alleviate pressure and relieve eye fatigue, suitable for office workers, students and people who work long hours in front of the computer. Sand pictures are especially suitable for office workers, students, people who work beside the computer for a long time. Great gifts for festivals, birthday, celebrations, anniversary and households. Specification: Material: Glass,Resin Size: Blue,Yellow Small: 17x13cm/6.69x5.12inch Black Large: 25x30cm/9.84x11.81inch Round: Total Height: 19cm/7.48inch Diameter: 17.7cm/6.97inch 17x4x3.5cm/6.69x1.57x1.38inch Package Includes: 1 Piece Dynamic Sand Picture