1. The Comeback Toy
1st Quarter Project

2. GOAL #1: Using the instructions provided, build a come-back toy that will roll a minimum of four meters and return to its starting point.

3. The Comeback Toy does NOT have to be made from a coffee can.

7. 4 meters

8. 4 meters
4 Meters ~ Feet

9. Designing your toy
You will have a week in class to build, run trials, and redesign your toy.
By the end of the week you will demonstrate your toy for the Final Test for a grade

10. Demonstrating Your Toy in the final test
Five attempts to demonstrate your toy.
Attempts 1- 3 are FREE.
Attempt 4 costs 5% of grade
10 points
Attempt 5 costs 10% of grade
20 points

12. Deductions
You will receive deductions on your project for the following
Not bring supplies in by September 29th (-20 points per day late)
Receiving assistance before or between attempts (-20 points per occurrence)
Changing the design of the can after final testing has started (-20 points per occurrence).

13. IMPORTANT NOTICE!
If, on the scheduled day the project is due, a student is absent due to a field trip, in-school performance, out of school trip, etc. then the student must demonstrate the toy for a final grade the day before.
If a student is on a pre-planned absence the day the project is due then the toy must be demonstrated the last day the student is in school before the absence begins.

14. Goal #2: Students will complete an in-class journal of the engineering design process while completing the project.

15. Journal
Minimum of 4 practice trials with teacher’s signature and journal entry
Sketch of final design
Sequence of energy conversions (flow chart)

16. Practice trials
Must be witnessed by teacher and initialed on your paper before your next trial
Journal of each trial will include the following:
What worked?
What didn’t work?
What are you going to change?

17. Sketch of final design Must include the following:
Include both an internal and external sketch of the toy
Measure and label the length, width, and height of the toy in centimeters
Label all the parts of the can in the sketch (can, bolt, nuts, rubber band, toothpick, twist tie)

19. Kinetic Heat There is friction between the ball and the surface.
Sound
The ball emits sound as it moves.
Potential
Gravitational
The ball starts at the top of the hill.
Kinetic
Mechanical
The ball begins rolling down the first hill.
Potential
Gravitational
The ball gains gravitational energy as it rolls up the smaller hill.
Kinetic
Mechanical
The ball begins rolling down the second hill.
Kinetic
Heat
There is friction between the ball and the surface.
Kinetic
Sound
The ball emits sound as it moves.

21. Extra credit options You may earn up to 10% extra credit.
Bringing in all the unassembled supplies needed to complete the toy (can, bolt, nuts, rubber band, toothpick, twist tie) a week early. (+5%)
Locating a recent scientific article (no more than 5 years old) and complete Science in the News write up. The article may be about any of the following: science of toys or a toy, atomic structure, isotopes, periodic table or elements. (+5%)

22. Project Schedule Early Parts turn in for 5% bonus September 26, 27, 28
Science Article and write up for 5% bonus
October 6th
All supplies needed for the project due and building starts
September 29th
Final trial due by
October 6th by 3 PM