
Robot Magic: Beginner Robotics for the Maker and Magician 167
• Pinch the knot of the clear balloon with your right thumb
and index finger. Your open left hand gently presses
against the other end of the balloon. Use your middle,
ring, and pinky fingers from your right hand to push
against the balloon a little as your index finger and thumb
hold the pin pulled back (Figure
82
). This position allows
you to gently press and hold the black balloon without
yet popping it with the needle. Let’s call this the “popping
position.” To pop the black balloon, all you will have to do
is slowly bring the needle inward with your index finger
and thumb. That ...