How do you play piggy in the middle board game?

I used to play this game with my friends at sleepovers when we were in Elementary School! It involves a group of kids (ideally >4 or 5 people) having their sleeping bags spread out on the floor and each kid gets into a different sleeping bag and hides inside it. The person that is "it" goes around and taps each person under their sleeping bag and that person snorts (like a pig). The person who is "it" then tries to guess who they are based on their snort. If they guess someone correctly, that person comes out from the sleeping bag and helps the person who is "it." The game continues until everyone has been correctly identified and are out of the sleeping bags. This game was a lot of fun!