Idea of Happy Icon
There is a circle with medium bluntness of a line. There is a curved line in the bottom showing the mouth. There are two dots above the curved line showing the eyes. Both the line and dots are centered in the circle.
This Happy icon has Android KitKat style
. If you use the icons for Android apps, we recommend using our latest Material Icons icon pack (please check our sidebar on the right). Otherwise, it's a solid icon pack that looks good in small resolutions, either on the web or in print. It's characterized by thick lines, smooth corners, and is optimized for 24x24 pixels.