1 Draw a half-circle.

Draw a half circle on construction paper using a compass or a pencil tied to a string. You can use the radius measurements below as a guide. The radius is the distance from the center to the edge of the circle.

• Small cone hat (e.g birthday hat) - 6 to 8 inches
• Medium cone hat (e.g clown hat, Santa hat) - 9 to 10 inches
• Large cone (e.g witch hat or wizard hat) - 11 inches or more

2 Cut out.

Cut out the half circle.

3 Form a cone.

Bring the two ends of the half circle together to form a cone. The more the edges overlap, the smaller the cone. Adjust the size of the cone so that the base fits your head. Make the base a little wider if you plan to add a brim or some "hair".

4 Staple at the base.

Staple or tape the cone at the base of the seams. Try on your hat and if necessary, remove the staple or tape and re-adjust the width of the base for a better fit.

5 Glue the seams.

When you're happy with how your hat fits, apply white glue along the seams.

6 Press at the seams.

Press along the seams from the inside of the cone to glue it in place.

7 Remove the staple.

Once the glue dries, remove the staple or tape at the base of the cone.

8 Decorate the cone hat.

By adding a few more details, you can turn your plain cone hat into any of these fun hats: