I love how this has got you absolutely stumped. You can pick stuff from the sink and put it out of the way. You can pile it on the goddamn floor if you need to. Whether your kid puts the dishes away or not is actually what allows you to wash the dishes. You could also move them. But you say the kid needs to do that so you can wash the dishes (even though you could wash them without it). It just makes it more convenient. See what I mean?