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My son and I did this. He had fun, and snacked as we put it together.
All you need is some Fruit Loops, Scissors, Tape, and Yarn.
First cut a string to any length you want.
Then place a piece of tape at one of the ends of the string. This will be used to thread the fruit loops on. Don't put to much on it, just enough so the loop will slide on.
Knot an anchor at the other end of the string with a fruit loop.
Now thread the fruit loops on the string...to whatever length you want.
Here is the finish project..