Mega dude,
Give 'em titanium hammers for Xmas!
OK, seriously - feed them, but feed them my special recipe...
Go to your friendly neighborhood garden supply store and get a small bag of diatomaceous earth. This is a very lightweight powder, and is about 100% silica - the microscopic seletons of prehistoric plankton. Don't snort the powder, because it is silica dust - but with reasonable care, you needn't be afraid of it.
Then stop at the drug store and get a little jar of BORIC ACID. This is a very mild acid that is used in eye wash. It also is safe unless you eat it.
When you get home, take a quarter cup of flour, a tablespoon of sugar, a tablespoon of diatomaceous earth and a tablespoon of boric acid and put them in a small bowl. add enough water to make a workable dough. You're going to feed this to the ants, so you don't need to get fancy with it. Once it is all mixed up, press it out into a thin cracker on a cookie sheet and bake it in you oven at 375 degrees until it starts to brown.
When the ant-cracker is cool, crush it into crumbs. Put it where the ants can get at it- like right near their nest, if you know where it is. Let them dine.
Here's how this works -
The diatomaceous earth is like microscopic broken glass. when the ants eat it, it will puncture their gut and kill them, just like eating broken glass would do to a larger animal. The Boric acid works in a different way - it is only slighly soluble in water. As the ants consume it, it will build up in their system and form crystals that have the same piercing effect as the diatomaceous earth.
You could also simply mix some of the boric acid and diatomaceous earth together and sprinkle the powder where the ants will walk through it. When the ants clean themselves, they'll consume bits of the powder, and it will kill them in time. I'd expect to see results in a couple of weeks or so.
- next week -- Nuclear Energy!!