If you are happy, clap your hand

What would it take to be happy?  
I wish I have an answer for that or a formula.  For me, I noticed that spending time with children and nature brings inner joy.  A simple gesture of waving at the kid next door watching me do gardening is enough.  No laughter, just a wave and a smile. 
Spending more time outside, in the garden, makes me feel happy. Will all that fresh air regardless of the heavy labour of trimming the hedges, I feel happy. 
One thing for sure which I cannot explain, having a deep prayerful life provides pure joy.  Praying while gardening and full of gratitude, just for today is enough. 
Have a wonderful day. 
To close, off here is a children song.