Add LED lights to Santa and Elf hats for more festive blinken litez! This is very easy to do, only takes about 30 minutes, and costs less than $10 per hat. I am pretty sure it took longer to write this instructable than it did to make the first hat. You can invite friends over and do several at the same time. I did 6 in one evening with my kids. They love to wear them, and everybody that sees them wants to know where we purchased them.