These are some supplies you are going to need to make your Gravity Racer .
- 1 piece of wood
- 1 pair of axles
- 2 pairs of u nails
- 2 pairs of wheels
- grid paper
- notebook
- pencil
- scale
- ruler
- paint
- ramp
- saw
First you grab a piece of grid paper. Then you draw a rough draft of how your car is going to look . After, you draw the picture of your car on the piece of wood. After this you paint the car and wait until it dries. Then you put the u nails on the bottom of the car, the holes facing to the sides of the car. Then get the axles and put them inside the u nails (in the holes) and then super glue the wheels to the points of the axles. When your done, you cut the wood in the shape of your car. When your really done, measure and weigh your car with your friend and even race them down a ramp. You could just make the ramp your self.