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by Vishal Bhatt


In pairs play the following game: throw a tennis ball at your friend from a distance of 2-3 metres and have her/him catch the ball. Now do the same by asking your friend to do the same by closing an eye (you may use a blindfold/eye-patch for 1 eye instead if winking). What is easier: catching with both eyes open or is one enough? Now repeat the same game by changing roles


No parts required.

Video Overview

    • Avoid using a hard ball.

    • Don't throw the ball hard

    • Do not throw the ball at each other's faces .

  1. Take the plastic garbage bag and fold it into a square
    • Take the plastic garbage bag and fold it into a square

    • Loop 6 rubber bands into each other as shown in the picture

    • Create a rubber band chain

    • Make 2 holes on either side of the folded garbage bag

    • Insert one end of the rubber band chain into one of the holes, with the help of scissors

    • Cut the loop on the other side and tie a knot

    • Do the same on the other side of the square, with the other end of the rubber band chain

    • First person throws the ball to her/his partner

    • Your partner catches the ball easily as both eyes are open

    • Close one of your eyes with the eye-patch/blindfold made

    • Do not try and wink one eye shut or close with one hand, as those will hinder the point of the experiment

    • This time the catch is dropped!

    • Repeat the experiment by exchanging roles

    • Make sure the ball is thrown each time without much change in intensity and trajectory

    • Make sure external factors like wind and elevation do not influence the motion of the ball

    • Perform the same experiment for 5 trials with one eye closed and 1 trial for both eyes open, at different distances. Use the table given.

    • Is it harder to catch the ball with one eye closed? Why?

    • Does it become easier if you do not change your position for several tries before closing one eye and keeping both open?

    • Increase the distance between the two players to more than 18 feet. Does it become easier to catch the ball even though one eye is closed?

Finish Line

Vishal Bhatt

Member since: 04/26/2017

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