W
W
hile Aisha was having a picnic with her fam-
ily one day she took herself off for a short
walk. She liked the green area where she was walking
very much indeed. While she was walking around she no-
ticed a ball covered with sharp spikes. "It's a good job I
didn't tread on that, otherwise the spikes could have
hurt me badly," she said to herself. Then, to
her amazement, the ball slowly unrolled
66
