An authentic-looking mediaeval hat can mean the difference between a great costume and an adequate one. While the same materials that were available then are not always available now, just learning about them while you make your medieval hat helps. When you take the time to create an authentic-looking hat, you will learn more about this time period. In addition, you can teach your children about mediaeval times if you make the hats with them.
Fold your card stock into a cone so the larger end will fit on your head. Leave a small hole at the tip.
Staple the two edges of the cone at the larger end. Trim the bottom with scissors so it is even. Add another staple closer toward the middle of the cone, so it stays together.
Cover your cone with velvet material, trim off any excess and glue it in place with your hot glue gun.
Cut enough wide ribbon to cover the bottom of the base of your henin. Hot-glue your trim to the hat.
Hot-glue gemstones and/or beads to your one-horned henin.
Gather up one side of your sheer material and push it through the small hole at the top of your henin. Glue the material in place with your hot glue gun. Arrange the sheer material to float down the back of your henin and around your shoulders once the glue is secure.
Draw a long, narrow isosceles triangle with a 2.5 cm (1 inch) base on a piece of craft foam, then cut it out. This is a triangle that has two sides the same length and one side that is not -- the 2.5 cm (1 inch base).
Measure the circumference of your head with a tape measure. Divide your head size by 3, then double that number. For example, if your head measures 51 cm (20 inches), then you would divide that by 3, which is 17, then double it to get 34. This tells you how many of those triangles you are going to need for your jester's hat.
Cut out the rest of the triangles you will need from the craft foam.
Cut a 5 cm (2 inch) wide strip of craft foam that is 5 cm (2 inches) longer than the circumference of your head.
Glue the base of the triangles to the inside of the strip that is going to go around your head with the low temp glue gun.
Glue the ends of the strip that will go around your head together, leaving enough room for it to fit on your head.
Glue a jingle bell to the tip of each triangle and around the base of your jester's hat.