Keeping a 2 year old busy on road trip?

My fiance and I are taking a little road trip from virginia to new jersey (about 5hours) with our 2yr old niece, and I wanted to know what are some fun things she can do while in the car? And what snacks should we pack for her that aren't very messy?? Thanks!

uhmm well take like a dvd playerrr...
annddd uhm food...cereal is always good. and juice boxes

lol, any food in a 2 year olds hand is messy (something I've recently learnt) but yes cereal is good, juice (preferably in like one of those kid bottles that dont spill if you turn it upside down), also the min she gets tired of eating, take the food away or it will become something to play with. try those sing a long songs...
it's hard to keep a 2 year old entertained, they wont watch tv for long (something else I've recently found) hopefully she'll sleep most of the way...

you can take a portable dvd player or some hand held games that are for his age
for snack you could probly just take some juice, fruit snacks, or like some gripz ( like cheezits but in smaller sizes)