To play this game, you don't need to be good at art, it's all about imagination. You'll need a piece of paper and two pens, ideally of different colours so you can see who did which bit. Draw a squiggle onto a piece of paper. Your child then look sat the squiggle and turns it into something. For example, they might see a boat or an animal. Swap over.
Variation one: a slightly harder variation is to build a picture together. Invite your child to draw the first squiggle, you then draw another squiggle (of there are more than 2 players playing, keep passing it around the circle). Keep passing the paper around until the image is finished.