1. Grab a cereal box and cut hole in it. But only on one side.
2. Get a empty glad wrap roll and tape it to the inside of the cereal box.
Roll ( Glad Wrap )
3. Get some elastic bands and put them on one side that is showing from the roll and then pull it and put on the end of the box.
4. Pull on the bands and it will make sounds.
5. Experiment with the strings and listen to the sounds.
scissors or craft knife