Reverse Sand and Liquid Timers - Set of 6Flip expectations with the Reverse Sand and Liquid Timers a captivating set of six visually intriguing timers that defy gravity by making the sand float upwards. Perfect for engaging children in inquiry based and exploratory learning, these timers offer a unique and mesmerising way to observe time, movement, and flow, all while sparking curiosity and discussion. Each timer measures 8. 5cm wide x 3cm deep x 13. 5cm high. These resources are excellent