hehe aeroplanes ^^

Another idea:
How does the shape of the wings of paper aeroplanes affect the distance they are able to travel?

Independent variable is the shape of the wings.
Dependent variable is how far it travels.
Controlled variables:

• fly all aeroplanes one after the other and at the same location, so the change of weather does not affect the results.
• one person throws all aeroplanes.
• to throw all aeroplanes with your dominant hand.
• don't have obstacles in its path that can affect the distance it travels.
• use the same measuring device to measure.
• for every plane, measure from the exact same distance
• use the same planes for repetition of experiment.
• use same thickness paper to make each plane.
• use blank pieces of paper of the same size.

Interesting....