Summer's around the corner, and the bugs are out in force. If you have an ant problem on your hands, cornmeal is a safe, surprisingly-effective way to get rid of them. One Good Thing by Jillee shares this tip (and many others) to get rid of pests. You'll want to find the offending ant hill, or at least determine where they are entering your home.
Once you do, pour some cornmeal in a plate nearby, and monitor it over the next few days to make sure that the ants are taking it back home with them. This works because ants are attracted to corn meal and treat it as food, but they can't actually digest it, causing them to slowly starve. It won't kill a colony as quickly as poison, but it's incredibly cheap, and completely safe to use in a house with pets or small children.