This project is really easy and should take less than an hour if you know what your doing.
• Corrugated plastic
• Large, old toy cars, preferably with suspension.
• Rc boat or truck (depending on what you want the trailer for)
• Old hacksaw blade.
• Hot glue gun (as always)
Step 1: Hitch.
I cut a good sized piece of plastic that conveniently fit in a little crevice of my car.
Then I pushed a nail through it to act as the actual towing rod.
Step 2: Actual trailer.
For mine I cut a large sheet of plastic, cut some side things (so my boat will not fall off), and glued the hacksaw blade and cars on.