Not for kids . . .

Probably the best app for creating high contrast line art from continuous tone imagery. A great selection of "pens" for whatever line or gray scale separation you need. The only other app that comes anywhere close is the C4LA app (Camera 4 Line Art) a Japanese app . . . if you can find it. worth whatever it costs.
Oh, and you can shoot videos . . .

bookindian about ToonCamera