The three science installations at Numaish Karachi, titled The Newton’s Cradle, the Pendulum Wave and the Sand Pendulum, are attracting curious children and adults. A joint effort of Dr Anzar Sheikh and Nadeem Afzal, The Newton’s Cradle explains the basic concept of energy in science in a creative manner. Five identical steel balls, each of 3.5kg, show how energy is conserved and transferred. Children can be seen crowding around the bench, watching in fascination as they pull back one of the balls and release it to find the motion reflected in the other balls as well. “Kids may not understand the underlying scientific concept of the transfer of kinetic energy from one ball to another but they will discover a pattern of the movement,” explained Dr Sheikh.