“Drawing like a kid” is it’s own special part of the craft. You have to deliberately step back from a lot of the skills you’ve learnt about what makes a “good drawing”, and yet since you usually have a reason to make a drawing that looks like a kid’s work, you still have to keep in mind all the skills that apply even if your rendering and anatomy is deliberately lacking and broken. You can’t even just draw a stick figure because after a serious education your stick figures are bursting with life and anatomy. So you look at a bunch of kid’s drawings, recall a few of your own special kid-art quirks, and you make sure the composition is crystal clear, maybe add a few labels in a childish scrawl or a neat parental addition...