This is how to make a medieval helmet out of cardboard

Supplies

You need:

1. Cardboard

2. Scissors/ exacto knife

3. Duct Tape

4. Sharpie

Step 1: Step 1: Cardboard

Take a piece of cardboard and cut it. I just took mine and cut a average size rectangle that work and I didn't really do any measuring.

Step 2: Step 2: Draw the Helmet Shape

Take the sharpie and then draw a shape of a helmet. If you don't know how to draw one just copy mine it is a shape of a spartan helmet.

Step 3: Step 3: Cut the Cardboard Out

Next cut out your helmet shape with the exacto knife or scissors. I used a exacto knife and I also cut too close to the middle part so I had to repair it with the duct tape.

Step 4: Step 4: Duct Tape the Cut Out Shape (optional)

This next step is optional. Take duct tape and duct tape the whole cut out shape. I decided to do this because I thought that it would look cool.

Step 5: Step 6: Making the Shape of the Helmet

For this step find something that is a cylinder. I used a water bottle. Take the cylinder and wrap the helmet shape around the cylinder (in this case a water bottle).

Step 6: Step 7: Making the Straps

For this step you are making the straps. You need some more cardboard. Again I didn't measure I just took some random cardboard and cut strips out. Then again I duct tape them (which is optional again).