I have created two sets of doodle card kits as kids prizes for a family event this weekend!!
I downloaded the doodles from the internet, laid them out with birthday greetings in fun fonts on a quarter sheets in Corel Draw and laser printed them on white card stock. I combined the doodle elements with fiber, punchies for central elements, single layer inserts and have included 8.5" x 8.5" pieces of bond paper along with a folding template for the creation of handmade envelopes which will coordinate with the cards. I watercoloured mine but they could certainly be coloured with any medium - pencil crayons, markers, chalks, etc.
A few hours of fun in a bag!!