Fun with blow painting!
Yang-Ting Shen, Ellen Yi–Luen · 2009
Blow Painting is a novel play interaction that enables children to blow at a toy windmill to create collage paintings of leaves on a digital canvas. The windmill is embedded with a microphone (to detect the blowing action) and a rotation sensor (to detect the blowing direction). Four kinds of leaves (Red Maple, Sugar Maple, Hickory and White Oak) are embedded inside transparent RFID sheets that can be placed under the windmill to provide different leaf "stencils" for the Blow Paining game.