At our house, costumes aren't just for Halloween. My kids love thinking up fantastical adventures and, when we make costumes, we want them to last for a long time because they get a lot of play. So when my daughter decided she wanted to be a princess for Halloween, she decided to craft a crown with some staying power...
Go through a bowl of buttons and pick out your favorite buttons. Bonus points for shiny, sparkly buttons.
Draw out the shape of your crown, and then cut it out. (Younger kids may need some grownup assistance with this step.)
Carefully sew on one button at a time. (You may need to help your child thread the needle or work the needle through the felt from time to time. It can be a little tricky at times.)
Overlap the ends a couple of inches, and sew the crown closed. (Again, you may need to help pull the needle through the felt occasionally.)
Here's a close-up of the back of the crown all finished up, so you can see what the stitching looks like.