The materials included:
- kite string
- index cards
- marbles
- tape
- paper clips
- paper cup
- scissors
- a bulls-eye target

Although most of the kids had the same design some worked better than others due to the construction. This was a great way to teach the kids about motion and forces, transfer of energy and technological design.
She placed first in the girls category AND overall. Let's just say she had bragging rights for a month and left with a smile on her face.
Want to do this on your own? Visit Starfish Education: The Brown Bag STEM Challenge.