Start by choosing and the clipping out the bitz you want to use.

Then pick out a set of legs and glue them to a base.

With the legs secure to the base, choose a torso and glue it in place.

Now glue a Slugga arm and a Choppa Arm to the Torso.

Next glue the Ork head you've chosen to the neck. Now you have a complete Ork Boy.