When Popsie is sitting at the top of the stairs I'll hid behind the corner and peek my head in and out. He meows everytime he sees me and then eventually he'll come down the stairs to get a pat on the head.
That's so cute, I do that with Sash too. We don't have stairs though but I'll peek around the corner at him and play peek-a-boo and he always nods his head back at me and opens up his little mouth to acknowledge me and it melts my heart everytime. Of course, I can't resist then going over and giving him a big kiss!