This is a video of the giant claw machine that Lay's Stax made in which your own child acts as the claw. You position them using traditional controls, then lower them so they can grab as many bags of chips as they can. Honestly, it doesn't really look like it matters where you drop them, unless you spot a pocket of nothing but sour cream and onion chips. In that case you drop them right in the middle of those. Also, just so we're clear, I am 100% not against covering my child in spray adhesive to score as many bags as possible.
Keep going for the video.