Without wind moving over the kite it won't fly. Some kites need lots of wind. Others need very little wind for them to fly. Just like a normal aeroplane, or even a bird, there are four forces that affect a kite when it is flying. They are gravity, lift, thrust, and drag.
Gravity pulls everything towards the centre of the earth.
Anything on the ground can't get pulled down any further than that, but things in the air can get pulled down to ground level. The heavier a kite is the harder it will be to fly. Kites are generally made from lightweight materials so that they will fly easily. The force that stops a kite from falling down is called lift . Lift is the force pushing the kite away from the surface of the earth.