Toss the pasta with the garlic butter and set aside.
To make the eyeballs
Cut each mozzarella ball and olive in half. See notes for amounts.
Cut each paper straw into three pieces.
Use a straw to gently make a hole in each cheese half.
Use the opposite end to poke out a piece of black olive.
Carefully push the small piece of olive into the hole you made in the cheese.
Repeat this process until you have as many eyeballs as you want.
To assemble the dish
Transfer the buttered pasta to a serving bowl.
Tuck the eyeballs into the noodles and serve.
Notes
To make two eyeballs, you will need one mozzarella ball and 1/2 a black olive. So, to make eight eyes, you'll need four mozzarella balls and two black olives.