This chevron car carrier, named casey, is available from Chevron gas stations. It ranges in price depending on what the station has priced it at and also if you find one that has been on their shelves a while they are much cheaper, since older, but the same. This is made to hold other chevron cars.
My son is almost 5 and has had this for well over a year and loves it. He also has some cars to load it up on and truck them around. My only fault with this is that now the cars are being made bigger and bigger, for example the pizza delivery truck and ice cream trucks, which only will fit on the top. It has been a while since they made a smaller car that will fit on the bottom. My son doesn't seem to care at all though.
It will hold 4 cars at a time and the cab does unattach from the trailer area. This is a favorite of ours and one fun to shop for, stopping at different gas stations to see what they have.