Using the 23 worksheets in this kit pupils will learn about gravity friction and inertia. There are assorted pulleys weights and forcemeters amongst other components all packed in a sturdy Gratnell tray for easy storage. The worksheets may be photocopied for repeated use. Contents:Gratnell Tray & lidPulleysWeightsForcemetersPaper clipsSticksBalloonsStrawsStringRetort Stand Rod Bosshead & clampWorksheets Dimensions: 150mm high 430mm deep 310mm Wide.Approx. weight: 5Kg