Editing Magnus Sports (section)

== Demonstration ==
;Presentation (Stage):
# Hold the wood plank at an angle, perpendicular to the audience and above the ground. Roll the tennis ball down it, and allow it to bounce away, to show the direction of movement. 
# Ask the audience if a paper tube should move in a similar way. After taking some answers, roll the paper tube down the plank. When it falls off the plank, it will move in the opposite direction!
# Show the tennis ball to the audience, and choose a volunteer. Toss the tennis ball to the volunteer, and have them throw it back.
# Show the Wiffle ball, and toss it to the volunteer. After the first toss, throw it with a spin, and watch as it moves around in the air!

;Presentation (Hands-on):
# Set out the objects, and prop the board up so the tennis ball and paper tube can be rolled off the side of the table. Be sure to secure a space where you can throw a ball back and forth.
# As students come up, have them try rolling the tennis ball down the slope, followed by the paper tube. If you have students who are willing, throw the different balls back and forth with them so they can see the wiffle ball changing direction in the air.