Nice, Harriette!!
All the ant bait recipes say you can use boric acid or borax acid.
http://www.ecologycenter.org/factsheets/ant_control.html Set out ant bait stations near the ants' entry points and/or foraging trails, so that the ants find them quickly, ingest the bait, and carry it back to their nest, where they feed it to - and kill - the rest of the colony. Bait stations such as Drax, with liquid bait (borax or boric acid in sugar water), attract ants all year round, and the containers have been improved to make them more child- and pet-safe.
Bait stations with solid bait are convenient, because they can be placed under the edge of carpets or attached with double-sided tape to walls, but they're only attractive to ants in the late winter and early spring, when the foragers are looking for solid food to feed the hatching larvae-adult ants cannot digest solid food.
We recommend that the active ingredient in the bait be boric acid or borax, because these ingredients are the least toxic to mammals and because they work slowly, allowing the forager ants to spread it to the queens and through the colony, before the foragers themselves die.
If you can't find borax or boric acid bait in a local hardware or variety store, you can make it at home.