How do you have a sleepover on Sims 3?

Click on the phone and find the Words, "Call sim..." and then once you click on that look for the Words, "invite over" and choose the sim's friends you want to invite over to your sim's house and once your sim's friends get to your sim's house click on one of the friends and click friendly and look for the Words, "Want to come to sleepover" and see what the friends respond with.

~I Hope I Helped You All That Need This Information~