It sounds to me like your kids are willing to tolerate at least some broken plays. I'm thinking cute interactions are the name of the game. I ended building a lot of stuff like this to play against my casual friends.
Here's a few suggestions:
Traditional Reanimator
Anything built around Recurring Nightmare
Maybe some random tribal decks
Ever since I saw
Ertai, the Corrupted, I've wanted to build a deck around him. The big problem I keep running into is that all the everything I build ends up better (which still isn't to say they're good) without him in the list.
The most recent deck from which he'll soon be cut is built around the following:
Reanimation: Recurring Nightmare, Animate Dead, Necromancy
Utility Creatures: Auramancer, Faith Healer
Utility Enchants: Legacy's Allure, Seal of Removal/Doom, Oblivion Ring, Reality Acid, Delaying Shield
Other: Intuition, Stormscape Familiar, Sigil of The Empty Throne
Cute, but dumb: Ertai the Corrupted, Ancestral Knowledge, Hatching Plans
I had a dirt cheap Soldiers+Equipment deck I threw together out of random crap lying around. Basically, it runs cheap soldiers that get better w/ gear, and cheap gear. Here's some stuff I ran, plus newer stuff that would probably fit.
Dudes: Auriok Steelshaper, Auriok Glaivemaster, Kitesail Apprentice, Kor Duelist, Leonin Den Guard
Gear: Bonesplitter, Shuko, Leonin Scimitar, Bonesaw
Pump subtheme if you want: Ballyrush Banneret, Daru Warchief, Aven Brigadier, Veteran Armorsmith, Veteran Swordsmith, Veteran Armorer, Captain of the Watch, Field Marshall, Rhox Pikemaster
Random Other Stuff: Stormfront Riders, Martial Coup, Darien King of Kjeldor, Conqueror's Pledge, Raise the Alarm