The Terro Ant Killer that is now for sale is basically powered by borax. There are recipes that you can make yourself for sugar/water/borax or boric acid to be found on the internet. It is of low toxicity to people and pets, but the ants take it home and feed it to the colony, and it does the trick. You can put a little bit of it out in a bottle cap where the ants are traipsing around, and they will find it.