Hey, if Beth wants me to leave a kid running around a house full of weapons, potions, alcohol, trophies, spell tomes, magic staffs, a fighting dog and an open fireplace, I'm more than happy to oblige them...oh, that's right, Breezehome ctd problem. Probably just as well the kid was left in the tavern.
It might be a 'warm and fuzzy' idea, but it certainly falls short on the 'good parenting' front...there is no consequence for not accepting the responsibility of an in-game adoption, such as getting locked up or severely fined for doing something like in my throw away line above.
More realistic, they discharges the summon fire elemental staff because it fire elemental look cool.
Eat all the giant toes in the ingredient container as you told them not to.
Perhaps disenchant some collector item weapons or armor.
So far my kid has
1) just one book in her chest: The true nature of orcs who is a racist book.
2) found some other strange items like an grand soul gem she gave to me.
3) then I told her to do her chores she went and lay down on her bed.
Looks very realistic to me.