They're pretty hypnotising to watch and they help teach the complex concept of time: a 3 Minute Classroom Sand Timer is a fantastic school resource for all classrooms!A Classroom Sand Timer can provide insight into a time before wrist watches smartphones and clocks but it also provides pupils with a visual practical and concrete representation of time. This helps their most basic understanding of time.Take pupils back to a time before digital devices with a Sand Timer for schools.Teach time with a concrete resource to help children grasp the complex concept of time.Use for timing activities as a time-out timer or a signal for quiet in the classroom.