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2.1

Minor Versionm

by Vishal Bhatt

Introduction

Using simple plastic materials: a couple of balls, a pipe, and a pencil, we make a ball-and-socket joint to represent certain joints in our skeletal system.

Video Overview

    • Exercise caution while using scissors/cutter.

    • Work with the lit candle under adult supervision.

  1. Mark the Ice-cream stick at 3 cm from both the curved ends. Mark an another line at 7 cm. Mark an another line at 7 cm.
    • Mark the Ice-cream stick at 3 cm from both the curved ends.

    • Mark an another line at 7 cm.

  2. Cut the Ice cream stick in to four different parts. We will only use three parts out of four Ice cream stick parts. We will only use three parts out of four Ice cream stick parts.
    • Cut the Ice cream stick in to four different parts.

    • We will only use three parts out of four Ice cream stick parts.

  3. Place the two curved sticks at the bottom and  the top of the Second Ice cream stick. Glue the sticks in a U shape. Glue the sticks in a U shape.
    • Place the two curved sticks at the bottom and the top of the Second Ice cream stick.

    • Glue the sticks in a U shape.

  4. Draw a line at the three fourth of the ball such that it joins the two ice-cream sticks holding the ball. Holding the ball in between the sticks will help you to create a desired shape. Draw a line on the upper stick at exactly 1.5 cm from the curved line.
    • Draw a line at the three fourth of the ball such that it joins the two ice-cream sticks holding the ball.

    • Holding the ball in between the sticks will help you to create a desired shape.

    • Draw a line on the upper stick at exactly 1.5 cm from the curved line.

    • Draw a line on the ball, directly below the line on the stick and also outline the curve of the stick on the ball.

  5. Trace the curved end of the stick on the ball, using a marker. You need to join two lines which you drew in the start. The third image shows the top view of the shape that we just drew.
    • Trace the curved end of the stick on the ball, using a marker.

    • You need to join two lines which you drew in the start.

    • The third image shows the top view of the shape that we just drew.

  6. Cut out the marked part from the ball. Glue the cut ball shape to the Ice cream stick. Let the glue dry for 5 to 10 minutes.
    • Cut out the marked part from the ball.

    • Glue the cut ball shape to the Ice cream stick.

    • Let the glue dry for 5 to 10 minutes.

  7. Make the hole using a scissor such that it is as big as the diameter of your pencil. Insert one end of the pencil in the hole and glue it in place.
    • Make the hole using a scissor such that it is as big as the diameter of your pencil.

    • Insert one end of the pencil in the hole and glue it in place.

  8. Now insert the Orange ball, inside the Green half cut ball. The ball socket joint is ready.
    • Now insert the Orange ball, inside the Green half cut ball.

    • The ball socket joint is ready.

    • The pencil should be glued firmly in the small ball, whose hole should not be much larger than the pencil diameter.

    • Be very patient while cutting the ball.

    • If the ball doesn't fit then scrape the extra bits and protrusions from another ball to make it as close to a "sphere" as possible.

  9. Ball socket joint using Two different size balls. Ball socket joint made using two same sized balls and thread.
    • Ball socket joint using Two different size balls.

    • Ball socket joint made using two same sized balls and thread.

    • To learn variations for Body Joints - Ball-Socket Joint. Please visit this link Body Joints - Ball-Socket Joint (Variations).

Raghottam Joshi

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