When moving out family members get children, pets etc. and my sim always had to meet them first before I could invite them over to hang out. This mod lets you invite these unknown sims as well as pets.
You can now give your sims a heritage! Is your sim from Japan? Give them the Japanese Ancestry trait! Or are they half Irish half German? Give them the half Ancestry traits!
Sims will always be able to do the group sing and wear costume interactions. Sims will also always be able to sing together by clicking on fireworks, cakes and present piles.