First, you'll need to cut out an 8"x4" rectangle (or a more amorphous shape at roughly that size) from your sheet of base material – these dimensions form the standard minefield size per the rules.

Small plastic shields do the trick as landmines quite nicely. Nearly every model in the Warhammer range comes packaged with a shield of some sort, and they are readily available from Mail Order on the cheap, too. Grab a hand full of 'em if you can. Now, clip about 12 small round shields off their sprues and set them aside in a pile. These small round shields will form the top of our landmines. Next, clip 12 large round shields off their sprues, but ONLY take the larger three shields from the sprue. You'll see that three of the shields are larger than the rest – you'll want to use these as the base for our landmines. Place these large shields in a separate pile from the smaller shields. After you have gathered these bitz, put the left over sprue trees to the side – you'll need them later.

Now, trim any funky mold lines from the rims of all the shields and get ready to glue. All you have to do is use either super glue or plastic glue to affix the small shields to the large shields to create a sandwich...which is our landmine! At this point, you need to fire up your hobby factory and begin mass producing some landmines. About 12 mines per minefield section is about right, but feel free to make more or less as a matter of preference. Once the smoke clears, you'll have a pile of explosive landmines. However, you may wish to add some more detail to your mines.

You kept those sprue frames from the shields, right? Good. Gather them up and prepare to mutilate them! If you noticed, there are some raised cylinders along the sprues. You can clip these off and glue them on the top off a plain landmine to create an extra bit of detail. Also, clip off some of the weird shapes found at the joints and curves, as they are great for detail as well. Once you glue a few of these pieces down, your mines will have a more complex feel.

Dig up some unused plastic bolters, close-combat weapons, and any other bit you think would look cool. Glue these and the mines onto the base willy-nilly to represent the random nature of a minefield. Alternately, you can set up little scenes of destruction like the ones shown below. After the super glue dries, texture your base with sand. You now have a minefield ready for painting.