Free hand drawing

Hi guys. I'm trying to make a game in which the player could, at one moment, select a mode for drawing. A piece of paper appears and he's able to draw a simple picture like with a pencil tool in Paint. Are there some assets that are FREE, and could do the job ? Thanks

 

Free? None that I can think of.

This one is $2 though. https://www.assetstore.unity3d.com/en/#!/content/12510

I've never tried it, but I did a quick search in the asset store to find it. You might come up with some better luck than I did.