Magic Forums

I have a son who is four and a daughter who is two... for yhe pas 7 months he's been saying that there is a man on fire in his wall..the other day he took a pen and started stabbing the wall where the man on fire lives... so i gabe him a crystal and told him that it was magic and would protect hom.. well now he says the man shows him the walls crackong with lava and my son talks about death and dying ect ect...and my daughter thinks there os a monster whp growls outside her bedroom window.. my kids do not watch tv bit once a day amd its the leap frog letters and alphabet dvd.. we don't even have cable or anything but in my bedroom where they do not go as i have poisonous plants so my door is always locked... they don't go to daycare or have mich interaction with other kids but some cousins who are from a very very high class who are very very religious and do not talk about thongs like that..... I'm confused as to what is gping on and how to fix this problem