This 30 minute timer is mainly made of acrylic, plastic, glass, and sand materials with fine workmanship. It is safe, lightweight, sturdy, and stable, making it easy to use and carry. It is not easy to fade, break, or deform, offering you lasting service. Our sand clock is perfect for managing work time and breaks, making goal setting pleasant and calm, helping you do things more efficiently, and developing a strong sense of time. Compared to mobile phones, this visual timer for toddlers provides a more enjoyable and less distracting experience, helping you stay focused longer when doing homework, cooking, brushing teeth, playing games, doing sports, yoga, and more.