It's the law, kids have to ride in a car seat.  I at one time had five car seats and two booster seats.  And all of this in a hatch back.  Not really, I just seemed to have lots of kids to drive around so I needed lots of car seats.  Thankfully I was able to share car seats with friends and put my kids into boosters I trusted.  Car Seats and Boosters, It's the law.