[Unicorn fish...?

[Before she can try to look for the plushie that Mikasa is talking about, she just had to call it a "glass box" then. Rey snorts.]

It's a claw machine. You put money in and it gives you the chance to win whatever's inside. Usually these things are rigged as fuck, but...

[Then she squints, assessing the pickings and their placements.]

Some look like they're in the right position.