A great new science kit from Pathfinders that uses hydraulics to throw projectiles in three different ways! (Soft clay included). By moving the way the swing arm is pushed by the syringe, it gives a variety of trajectories - perfect for inquiring minds that enjoy testing ideas (and even learning about graphing)! Lots of educational material about levers and simple machines, and plans to make a target. Test different materials and learn about density and air resistance! The perfect thing to take care of angry birds!