I have ants creeping along the skirting board from outside the front door. Was certain that I had read that custard powder was effective so I liberally sprinkled cornflower. Well the rain has now blown through the ill-fitting door and made a nice paste. When I have cleared that up (before DH comes home hopefully) any suggestions for anything that can be used until I get some child-friendly but lethal-to-ants stuff tomorrow?