How do you shake your grass skirt on the beach on the sims2 bon voyage?

In "The Sims 2: Bon Voyage," to shake your grass skirt on the beach, you need to have your Sim wear a grass skirt outfit. Once your Sim is at the beach, select them and choose the "Dance" option, then select the "Hula" dance. Your Sim will perform a hula dance, which includes shaking the grass skirt. Enjoy the tropical vibes!