Truck and Trailer Pattern
I designed this truck and trailer to carry little race cars (the pattern for the race cars is free on my blog in my Cars and Trucks Crochet Along). The back of the trailer is hollow and can fit 2 cars.
It also fits the very first amigurumi toy that I created for them, a little multifunctional tractor (provided you don't have the bulldozer implement attached as that is a little too wide for the trailer, though detached it fits inside the trailer). The pattern for the multifunctional tractor can also be purchased in my store.
Because trucks can have more than one trailer attached, you can easily add extra trailers on the end (though you have to detach the end trailer to open the middle one):
The pattern is available for purchase in my shop here.