Neat and compact ramps for floor or tabletop use. The solid wood ramps adjust to different heights and take apart for easy storage.A fantastic tool for investigating forces: move onto different surfaces to investigate the effects of friction; raise or lower the ramps to investigate the effects of gravity. A great way to slow down demonstrations for 'falling'. Will a heavier or lighter car reach the bottom of the ramp first? Would also be great to use as part of cross-curricular road safety work.The set includes 5 ramps and 5 open-backed trucks which can be loaded for other investigations.Dimensions of ramp: 115mm x 500mm.A set of Ramp Surfaces are available to purchase separately (B8R08008).