Kimberly, I was raised on a small pig & beef farm way back in the 50's. Even back then I remember my father Never letting us kids go near the pig pens. His pigs were quite tame but as he always told us-"never trust a 200+# pig, they can & will eat anything they can corner".
We were only allowed near but never in the pens when my father was present.
Fast forward to the last 20 yrs. We've raised many pigs and I have never had any actually attack me outright but I have had them bite at my thighs, ankles and hands while I'm doing chores. We have always had ours within a fenced pasture so their aggressiveness wasn't due to overcrowding.
I have never had any of my chickens eaten but I do know others who have.
I have been told that if a person were to fall or get injured while in the pen, the pigs would be more likely to attack, especially if they are aggressive to start with.
As for the kids, please play it safe and keep them far away from the pig enclosure. Pigs are very intelligent, interesting creatures but they are still after all an omnivore and if they will kill and eat a chicken, who's to say they wouldn't go after a small child.
I always thought 'my pigs wouldn't be mean or bite' but I've since learned even giving them the best care with the best food is no guarantee that a full size pig won't turn on you without provacation.
My last three were shipped to the processor in Jan, and I have to say I felt no sadness when they were gone. I was bruised and battered by the time these three got to 300# each.
Good Luck,
Kathy