Ducks... can't find the lake

These are the baby ducks that aren't so "baby" anymore - they seem to know there is a lake behind these houses, but can't figure out how to get to it. They just keep walking back and forth across the fronts of these 2 houses... They originally came from the lake behind my house, crossed the street, and have been wandering around out there for a while now... Not sure where the mom duck is...