The Bigjigs Toys Large Sand Timer is a great educational tool designed to help understand the passage of time in a visually effective way. **This durable design makes it an excellent resource for all ages.** It's perfect for use at home or in schools to time any activity such as studying or cleaning. **Features:** - Measures a 30-second interval (note: not precise to the second, slight variations may occur) - Ideal for time visualization and management - Durable construction with an inner glass sand container and a sturdy outer protective plastic casing - Complies with current European safety standards **Technical Specifications:** - Dimensions: 7.2 x 7.2 x 16.5 cm - Suitable Age: 3+ - Material: Solid plastic, glass, other materials