My mom made these Halloween die cuts for S (if you don't have access to a machine, you can just cut some free hand) and I came up with these two activities over the weekend. The first is a matching game. I lay all four cut outs on the floor in front of us, then I hand him one of them and ask him, "Can you find the other ghost?" He then lays the ghost in his hand on top of the one on the floor. This is repeated with each one. I modeled this a few times for him before I let him try and thought aloud, "Hmm? No, that's a cat. Oh, look. There's the ghost!"
The other thing I did with them is make stick puppets. He likes to "fly" the bat and say "boo" or "meow" with the ghost and cat.