I travel down to visit my Dad pretty regularly (about 4 hours) and bring the kids. I've got a one-level cage (24 x 30?) that barely fits through the car door, and a standard cat carrier. The two get connected by a length of heavy-duty clear 4" tubing, and a T-junction that leads to an additional 10' length of tubing that drapes all over the car. The cage is in the back seat, and the car carrier is in the front, and the tubing goes along the top of the back seat and along the side wall to the front seat box. This way, the kids can lie in a hammock, or snuggle in the relatively dark cat box (which is also by me as I drive so they can come see what I'm up to), or they can sit in the tube and watch the world go by. Or, (a favorite with hyperactive Missy) they can just race around and around the 10' length of tubing. Doesn't leave room for too much else in the car, but it's fun, and safe. The only thing I worry about is if the tube is in the sun, because it can get hot. I bring a towel to shade whatever part gets in the sun and adjust it as I drive, and make sure the kids have plenty of water. Sometimes I use a spray bottle to mist water on them (works for people too!) My car does have air conditioning, so temperature isn't that much of a problem. I've had a couple of people express interest in my tubing arrangement. The tubing is much heavier-duty than dryer tubing. I have it permanantly attached to the cages to connect them, and in three years of digging, I have yet to have a ferret damage it at all. I use heavy-duty "blast gates" to connect the tubing to the cages, so each cage can be closed off from the others. I've thought of making up kits and selling them on eBay; it'd be $40-$60 to connect two cages, or a cage and a cat carrier (not including the cat carrier). Maybe less if I can find a wholesale source for the materials. Is this something that would interest anyone? --Claire (Sam, Frankie, and Missy; not to mention Louis and Lilo) [Posted in FML issue 4454]