You will need;
-String- any colour
-Pins or tacks
-Pegs or clips
1. Simply hang some string at the desired height.
2. Find clips or pegs you like the look of, I used mini wooden pegs for mine.
3. Hang the artwork from the string with the pins. You may need to place another pin/tack to support the middle depending on the length of string that you are displaying on.
My kids love having their work on display and its so easy to update the drawings when they have new work- I much prefer this to a fridge full of pictures.