We are flying with 2 Coccoros over Christmas and won't have a stroller with us. I want something like the Brica travel cart but I am concerned that the Coccoro won't fit on it because the base is round. Anyone have any suggestions? We won't have any rolling bags with us so attaching to that isn't an option. I could possibly get a stroller that I could strap them to but I'd rather strap the kids into the car seats and attach to a cart type device move them through the airport on the cart. Bonus points if you can pull it down the aisle of an airplane!