i'm going to be driving cross-country with my parents in about a month. i'm planning on playing half-life 2 on my laptop when in the passenger seat. i already have a power inverter so i can use the cigarette lighter...

my question is, how can i use my laptop and my mouse when in a car?? i can't picture how i'd use the mouse or where i'd put it. is there some kind of surface i can put on my lap to do this? maybe something made for this... or just a clever use of space?

thanks for any help you can provide.