Kids see things adults can't. They are brand new to this world, more accustomed to the realm from which they came.

When my kids saw things I'd sit down and do a meditative visualization where I purged my home with loving white light and expanded that to cleanse my whole neighborhood. It always worked for about 6 months then i'd have to do it again.

Ive astral projected since childhood. At one point where my kids were riddled with fright I projected and hunted throughout our immediate environment and encountered a couple nasties lurking about. Maybe brought in by some unbalanced neighbors. Anyway I sent them away and continued the visualization.