My son got a webcam for his PC, and wanted to do stickers on pictures, similar to those on Android and IPhone mobile apps.
Created a simple camera app using Qt, using canvas to persist the stickers ontop of the camera image.
QtStickerCam in game

Unicorn Paint

For my daughters upcoming birthday I wrote a fun little finger-painting game. It was inspired by those scratch art paintings and some features of html5 canvas erase and transparency. UnicornPaint UnicornPaint