How to Create a Water Bottle Rocket

I made a water bottle rocket and i made it because i thought it was interesting.

You are going to need a flattened cardboard

A sheet of poster board 

A manila folder 

Duck tape 

2 2L bottles 

You roll up the poster board using tape and one of the 2 liter bottles make sure its lose but not to lose.

Then you cut fins out of cardboard with anything that can cut cardboard .

Then you make a cone out of manila paper  and attach it to the rocket .

Then you attach the fins using duck tape and try to make the fins attach straight up .

Then you tape the cone you made on the top with the point facing up.