Learning Resources Big Time Classroom Clock Kit. This comprehensive clock kit is perfect for demonstrating and teaching primary maths learners time! Hidden gears maintain correct hour and minute relationships as you demonstrate time-telling concepts for children to copy on their mini geared clocks. Clocks are made from durable plastic and have easy-to-read hour and minute markings. Hands are colour-coded to aid teaching of hours and minutes. This teaching time set includes a helpful teaching guide, large demonstration clock for front of class use and 24 mini geared clocks for class participation. Demonstration Clock measures 34cm, mini clocks measure 10cm. Suitable for ages 5+. Extra Learning Resources Geared Mini Clocks are also available (available separately)