Thanks everyone....No, I really don't like the idea of travelling without a carseat but like Madfelice said, our seats don't work in american cars (at least as far as I know). I did email Super Shuttle and they did confirm all their seats do have seatbelts but they definitely don't provide carseats. A car seat, although of course highly recommended, isn't required for a 4 year old. Shame that they don't provide carseats.....I think that would be a brilliant idea for shuttles to do that even at an extra cost it would be so worth it and helpful to alot of people I'm sure. In reading some taxi laws I found online mostly it states that if it's public transport such as taxi, bus, shuttles then carseats aren't required. Again, it's not about trying to be lazy as I most definnitely DO CARE about my daughter. It's just that unfortunately I have no way of having a seat for her from LAX to DL. Once we are there maybe there will be somewhere around there I can go buy a booster or something for the rest of our trip. Anyway, just wanted to post any info for anyone else who might encounter this problem....and of course, if anyone out there has any helpful tips on what they have done I'd love to hear them!