Isn't this a cute idea! All you need is a shadow box which you can get at Michael's or Hobby Lobby (with coupons), a box or two of crayons, and some white card stock. Chop up the crayons for the desired name, glue on the card stock, and then write the teacher's name to the side. I don't like my own handwriting so, I would probably run it through the printer and use a font I liked.
This is such cute and simple homemade teacher gift. I promise the teacher's will love it. I know I would have.