CONSTRAINTS & CONSIDERATIONS

CONSTRAINTS:

1. Purpose of the ball sorter   
2. Size of the bins/compartments
3. Size and number of the balls
4. Materials to be used
5. Type of balls to be used (ping-pong balls and marbles)

CONSIDERATIONS:

1. The length of the path 
2. How wide the path
3. Size of holes
4. Number of holes
5. The use of styrofoam

MATERIALS:

1. Cardboard/ Cheap board/ Illustration board   
2. Pencil and Eraser
3. Ruler/ Meter stick
4. Tape and glue
5. Cutter and scissors
6. Paint and paint brush/es
7. Marbles
8. Ping-pong balls
9. Styrofoam

EVALUATION CRITERIA

1. Can the styrofoam make the base more stable?  
2. Are the materials enough to make an efficient ball sorter?
3. Is the path wide enough to make the ride down smoothly?
4. Can the size of the holes affect the sorter?
5. Is the size of the bins enough to hold the balls?