C.V.
Borax.
Sprinkle a little in the very backs of cabinets, in the corners where they come in, wherever kids can't access.
All ant bait, including Terro, is made from Borax. I've seen lots of recipes for sugar-water-borax baits...which all work just fine. But I've had equal success just putting down borax, covering the area to decrease access to humans and pets, and sweeping it up a week later.
Keep kids and pets away from it. It's dangerous if inhaled.