I'm babysitting the cats at Chez Vanilla. That's Julius and Iain on the right. Normally Julius is the antisocial, somewhat alienated one, but today he pressed himself against my chest, rested his nose under my chin, and purred and purred and wouldn't let me go.
Julius has a weird purr. It's high-pitched and articulated and makes him sound like a cheap BBC robot monster.
Anyway, I keep trying to get the cats to play with their toys, and I've discovered that the best "cat play music" is Kraftwork, especially "Musique Non Stop." It moves at exactly the right speed and provides two or three different beats, depending on the adrenaline level of the animal. Use the downbeat snare for the "cat toy jump" part of the game, and the doubled, higher-pitch snare makes for some nice "brush the toy along the ground" moments. They say that cats originated in Africa but I think a lot of them are actually German.
In case you don't have the album handy I've included the video. This is also useful if you want to give your child nightmares.