Who, on the whole, do you find happier: child or adults?

I should be the contrarian to this Q and A.  Now let me answer this question in a few ways.  Children are not necessary going to show their feelings because they are still growing up, learning how to deal with their feelings like: hurt, pride, joy, happiness, and sadness.  Some children do adapt well to situations when required.  In unhappy situations, they would put up a brave face.  Although they are not happy at all.  They will do other things to warn they are not happy at all.  Children nowadays are dealing with more information then the past 20 years or so.  Children are not entirely shield from the technologies and from their peers at schools.  Even two and three years old are being looked at and being evaluated by their own peers. The few things that parents could do: instill the positive Zen or playtime or spend more good times with the child.  Allow children to take the hit and triumphs and allow them to come to you as a parent.  Let them be a child and you be a parent.  Your connection with your child will not end when they are 18 years of age or when they get out of your house.  You are as a parent, there for good for good and for worst, just think of your wedding vows without its legal implications.  
(Thats after when the kid reached its adulthood)
As for adults, enjoy your time with your mom and pa when you can.  Even when they nag and they are really making 
you upset and about to have a nervous breakdown.  Every minute with your family in any way are worth it.  Call, email, instant message, text or see your parents so that you will be ensure your mental happiness and also physical healthiness.