I truly love the process of nurturing creativity and asking young people to draw, especially the ones who feel that they are no good at drawing. This reminds me of a festival that I went to that had a comics project somewhat similar to what you have here. These guys set up a table, had a huge scrolling paper roll and asked anyone passing by (during a festival with high family traffic) to draw a panel. Check it out here: http://durhamcomicsproject.org/2013/08/eno-river-fest-comic/
What I love about this project is that it's a great way to first engage and introduce creativity without requiring too much "work". What better way to introduce creativity than to have their parents join them in drawing a comic at a festival?