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How to Build a Rocket Car

1.
Lay out your pattern on a styrofoam tray. You need 1 rectangle, 4 wheels, and 4 hubcaps. Use a compass to draw the wheels.

illustration of instructions at left

2.
Blow up the balloon and let the air out. Tape the balloon to the short end of a flexible straw and then tape the straw to the rectangle.

illustration of instructions at left
illustration of instructions at right

3.
Push pins through the hubcaps into the wheels and then into the edges of the rectangle.

4.
Blow up the balloon through the straw. Squeeze the end of the straw. Place the car on floor and let it go!

illustration of instructions at left
 
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