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Major VersionM

by Procheta Mallik

Introduction

Glue the picture of bird and cage on the two sides of given thin straw. Make a hole in given fat straw, insert a thread through this hole and loop the thin straw around this thread. Move the fat straw to the two ends of the thread and observe the bird and cage picture.

    • Make sure you do not poke yourself with ends of thick binding wire .

    • Handle the scissors with care

  1. Take the bird and cage printouts . Apply glue  on the thin stiff straw and place accordingly on the back of one of the printouts, in the middle with most of the straw jutting out. Apply glue on the sides of  bird and cage printout along with the thin stiff straw and sandwich the straw between the printouts.
    • Take the bird and cage printouts .

    • Apply glue on the thin stiff straw and place accordingly on the back of one of the printouts, in the middle with most of the straw jutting out.

    • Apply glue on the sides of bird and cage printout along with the thin stiff straw and sandwich the straw between the printouts.

  2. Take a fat straw piece (~8cm); this is about one-third the length of a full fat straw Take the thick binding wire (~30cm) and bend it in the shape of a bow. Tie a string with a knot from one end of the bow
    • Take a fat straw piece (~8cm); this is about one-third the length of a full fat straw

    • Take the thick binding wire (~30cm) and bend it in the shape of a bow.

    • Tie a string with a knot from one end of the bow

  3. Using the sharp end of a pair of scissors, pierce a hole about 1 or 2 cm from one end of the fat straw. Repeat the above step directly opposite the first hole Insert the loose end of the thread through the holes.
    • Using the sharp end of a pair of scissors, pierce a hole about 1 or 2 cm from one end of the fat straw.

    • Repeat the above step directly opposite the first hole

    • Insert the loose end of the thread through the holes.

  4. Pull the thread from the other hole . Secure the end of the thread with a knot to the other end of the binding wire bow Place the thin stiff straw between the thread in the fat straw, as shown
    • Pull the thread from the other hole .

    • Secure the end of the thread with a knot to the other end of the binding wire bow

    • Place the thin stiff straw between the thread in the fat straw, as shown

  5. Twist the thin stiff straw to form one loop. Insert the thin stiff straw inside the fat straw. Push the thin stiff straw half way through the fat straw.
    • Twist the thin stiff straw to form one loop.

    • Insert the thin stiff straw inside the fat straw.

    • Push the thin stiff straw half way through the fat straw.

    • Hold the fat straw and move it from one end of the bow to the other and you should observe the illusion of the bird in the cage .

    • The holes made on the fat straw should be big enough for the thread to slide easily.

    • Make sure the bird and cage are properly glued to the thin stiff straw.

    • The thread on the bow should not be too loose .

    • The thin stiff straw should be inserted sufficiently into the fat straw

    • Measure the time taken to move from one end of the bow to the other.

    • Move it slower and observe. Record the increased time along with your observation. Is the bird free from the cage?

    • Decrease the time, i.e. move faster, and observe. Record the decreased time along with your observation.

Finish Line

Suhail Ahanger

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