To help keep ants from invading your home, thoroughly combine 2 cups borax and 1 cup white flour and pour the mixture into a clean, dry, quart-sized jar that has a screw-on lid. Punch multiple holes in the lid and then screw it onto the jar. Sprinkle this powdery deterrent in a narrow swath against the outside of your house's foundation.
Borax can be a skin or respiratory irritant and can be toxic if ingested in large enough amounts, however, so you may need to prevent curious little fingers or paws from coming into contact with it. Here's one way to do this: Cut narrow strips of chicken wire; curl each strip lengthwise into a half-moon shape with a diameter wide enough to cover the borax swath; then lay them, end-to-end, over the powder, with one long side propped against the house and the other long side pushed about an inch into the soil along the outer edge of the borax swath. Refresh your borax border as needed, especially after a heavy rain.
Adapted from "101 Old-Time Country Household Hints," © 2008 Publications International, Ltd.