They also sell a bottle of liquid. Just put a little blob on some small pieces of cardboard. Very effective. And I think the active ingredient is boric acid, so relatively non-toxic, although maybe you need to be careful with pets.
The tiny ants made their yearly appearance in my kitchen last night. I had been waiting to welcome them and now they are busy busy suckin’ down the liquid Terro. Kind of fun and interesting to observe them. For a day or two then RIP.