This is a spin on the classic game of musical chairs. Label the living room sofa as the home base and then play some music. The kids are charged to go and do some speed cleaning while the music plays. When it's switched off, there's a mad dash for the sofa and the first one there gets to sit out the next round before rejoining the cleaning rotation. After a few songs, you'll get a lot of tidying up accomplished, and your kids will have fun sitting out while their brothers and sisters do the dirty work.