Although I don’t condone too much candy, when given sparingly, can help save the trouble of having to keep a child quietly entertained and happy. The trick is not to reward bad behavior. Don’t give the lolly in order to quiet a whining child. Instead, mention a coming reward if, a big IF, the little one behaves. Watch your kid muster all in order to be the obedient and well-behaved child, and then, give the reward, a lollipop. What you will have is a toddler who feels accomplished and content with his prize; but more importantly, you get a child who is behaved for some time on a long flight.