Advice for babysitting tonight?

I'm going to be watching two girls (6 and 9 years old) at my house while their dad players poker downstairs. Soo, I was never given a rule that they couldn't go downstairs but they're paying to keep them away...so I'm stuck upstairs. I don't have a TV up there so no Wii or movies, but I have board games. I've never met the kids but if they're girly I'm really good at doing hairstyles and so I was gonna maybe do like a fashion show or something? I can bring arts and crafts to my room but I don't really know what kind they would like. I can have the radio on for music. I need some more ideas! Thank you!