Step 1: Materials needed:
2. Battery powered string of LED lights. I got mine from Walgreens. They are $4, or they are on sale all the time for 3/$10. The ones I purchased last year had 20, 2mm clear, LED's. They are very bright and add a nice sparkle. They were powered by 4 AA's and will run continuously for days. The ones for sale this year have 15, water color, 5mm, LED's, powered by 2 AA's. They will run for about 4 days on one set of batteries. The 2 AA's is nice because it makes the hat lighter and also makes it easier to hide the battery pack.
Do NOT use regular battery powered Christmas light bulbs! They are incandescent bulbs that will get hot, and can burn you or the fabric. They will also eat batteries like crazy. Only use LED strings.
3. Hot glue gun and glue sticks
4. Small sharp pen knife.
5. Clean work surface you won't mind getting some hot glue on.