If you are having trouble attaching the zombie arms to the body, try the following tip:
The zombie figure is designed so the arm ball joints and sockets are two slightly different sizes to ensure that the proper upper arm is assembled in the proper place. The left side is the larger side; the right side is the smaller side.
If you are having trouble attaching the zombie to the bricks, try these tips:
Be sure to first press the legs together at the hips to be sure the legs are fully attached to the body before pressing the feet of the figure onto the brick nubs.
Be sure that you are NOT attaching the feet over a nub that contains an "x". This nub is a bit larger and may not allow one of the feet to stay attached. Attach the feet firmly on any other nubs on the brick for a better fit.