This is a trailer made from Lego for an RC car. It can be used for hauling small toys around.
Step 1: The Bottom and Wheels
For the wheels I used a 2 by 4 axle and small wheels. The bottom is an 8 by 16 base plate. The hitch beam is just a 1 by 7
Step 2: Hitch Connection
For this I used a 2 by 1 flat piece and a 1 by 1 brick piece drill a hole and put a small screw or wire so it will turn. Glue this on the back of the car
Step 3: The Trailer Box
I just used two layers of long narrow pieces so the cargo won't fall out.
Step 4: The Cargo
For cargo I used miniature space people. You could also use other things, like Lego and die casts .