Robert Bruce mentions in his book similar experiences. He concluded that it was negs way to distract him. Try leaving night light on for the children and maybe some soft music, maybe nursery rhymes. That should make things more difficult for the negs. (If that's what happening in your home also).
-Pete
I have young children in the house, ages 8, 5 and 3. I have noticed that when I meditate they consistantly have nightmares. It is almost uncanny the relationship between the two. My wife thinks they are watching to much Scooby Doo, but it is strange how often my meditation and their nightmares are conjoined.
Any one have similar experiences?