Im renting a car to drive from Indianapolis to chicago with a baby in a car seat is there a place i can leave it stored in the airport for 2 weeks while I'm on my trip?

If you're talking about leaving the car seat, then no, there are no storage lockers at O'Hare. Some suggested the attached Hilton hotel, but you'd need to check with them. If you're talking about a place to park your car for two weeks, then yes, you have options. The Economy lots are the way to go unless money is not a concern. Lots E, G, and H are your best bets for long-term parking. Prices vary between $10-$17/day.

Yes