Simple things which make you smile

Are there any simple things in life that make you smile.
I never thought much about it.
As the spring has already started, it is nice to see day light after coming out of the office.
On the way back, I saw a rainbow.
Big deal?
Well...it was a very big and bright rainbow that I ever saw and I started to smile automatically and wanted to keep looking at it.
I wished I had a camera to capture it.
This picture is courtesy google though !

Simple things make us happy and smile :)