It is safe to use with a crawling baby in the house

As long as Ortho® Home Defense® Insect Killer for Indoor & Perimeter2 Ready-To-Use is applied according to label directions, there is no harm to humans. People may re-enter treated area after spray has dried. Once dry, it's very difficult to dislodge the residue, so exposure, if any would be minimal. The better the area is ventilated the more quickly it will dry. If the area becomes wet again (by rain, dew or watering) after it has dried initially, the product won't reactivate.