1. Must be able to hurl a marshmallow.

2. Adaptable for rubber band power.

3. Can recycle parts from a toys.

4. Body must be home made and decorated in a theme.

5. No more than two partners working on an entry, however three partners can have three entries, one entry for each partner.

6. Maximum length of 30 cm.

7. Any number of rubber bands.

8. Must be able to fire from the floor.

9. 80% of grade determined upon submission and above rules.

10. 20% of grade determined by competition in rolling distance.

11. Extra points awarded for voting of best design, most likely to succeed and best use of materials.