Babysitting a 6 and 9 year old?!?

I'm going to be babysitting two six and nine year old girls on Wednesday night at my house. Their dad will be playing poker with some other guys and my dad and the kids will be upstairs with me and I need some advice of what to do! I've babysat before but they were always younger, and I have never met these sisters.. I don't have a tv upstairs so no Wii, I was thinking doing 'makeovers' and doing their hair (im really good at that) , eye shadow, lip gloss, stuff like that. would a nine year old like that? what else should I do? Also, They should leave around midnight, so should I give them a bed time? thank you!