Goody Bag Pass Around

Each year at my birthday party, I open my presents from my friends, and then we play a game I made up. I take the amount of bags needed for each person at the party, and buy a lot of little gifts for each one. Each bag has different things inside, but there is one special bag, which has a "gag" gift inside. I usually put something stupid and funny in that bag.  When it is time to play the game, we would all sit in a circle, and my mom would turn on the music.  We would then pass the bags around the circle clockwise, and my mom would then stop the music at one point. The bag you end up with you can either open it, or keep passing. You keep passing until everyone has opened their gift.