by the sounds of it it may not be your dad. but another more...cheeky soul.
perhaps talk and ask your dad to come and guide this spirit out of your home. it sounds like this spirit it wasnt attention buy moving dolls and braking things - but if you can ask them to move on that you do not want them braking things and scaring your children. your dad will most likely come and help move this spirt on.

I doubt the spirit meant to scare you and your family but best to ask them to move on now before they become "at home" xx