The most recent LARPing I've done was with my 6-year-old neice and her unicorn pencil case!
I was trying to watch Ash vs the Evil Dead and she kept wandering in, forcing me to hustle her back out to her mom. She wanted to play though so in the end I relented and asked what she wanted to play.
She wanted to play with her fluffy unicorn pencil case, called Skye, which contained a spare pair of pants in case of accidents and a plastic mouse called Mousey.
I took an A3 pad and wrote "SKYE" at the top.
After some questioning, it turned out that Skye did not have a career or any job ambitions, but enjoyed flying using her magic horn. She was also capable of casting other spells using her horn, one of which made people pooh themselves, naturally.
So I wrote "Unicorn Magician" under her name.
For attributes I decided to improvise, listing FITNESS, NIMBLENESS, CLEVERNESS and STUBBORNESS. I gave these a +3, +2, +1 or +0 based on a series of questions about what Skye preferred to do at playtime, given a choice of racing other unicorns, skipping, reading a book, or helping the teacher tidy the classroom even though the other unicorns wanted her to play. Phew!
I gave her 10 Health Points, which the kid could count on her fingers.
Then I got out 2d6 and wrote down the target numbers as I explained the mechanic.
10+
Great (written in green)
7-9
Just OK (written in orange)
2-6
Not good (written in red)
This was ripped off from Apocalypse World.
We then played the adventure of Skye and Mousey, as they awoke one squally morning after a deep sleep, having been flying with friends the whole day before.
They got out of bed and it smelled terribly, because Mousey had rotten cabbage for dinner and was trumping a lot. They went downstairs and prepared breakfast, but when Skye checked the doorstep for some milk from the milkman she saw that her house was floating in the middle of the sea.
Forgetting breakfast, she had Mousey climb back inside her (I guess
she was technically a pencil case), and used her magic horn to take-off in search of dry land.
After a while, Skye saw another unicorn floating on its back in the sea, a cuddly toy called Pom-Pom.
Skye used her magic horn to conjure a third cuddly toy, a 'sea monkey' called Coconut, who dived in and rescued Pom-Pom. Skye then opened herself up (yeegh!) and swaddled Pom-Pom in the spare pants.
(Coconut was dismissed by being tossed across the room.)
Carrying Pom-Pom on her back, Skye found her way to a strange island with tall cliffs that jutted out of the sea like the coffee table it was. It looked like it had just fallen out of the sky.
They landed and rested, and Pom-Pom explained that she had awoken to find her house at sea too. She too had flown off in search of dry land but ran out of magical puff. It had rained so heavily overnight it must be a deluge, a great flood.
Skye wasn't hugely interested in this and conjured breakfast. This was not her first Cleverness check but it was the first check that she failed. So instead of unicorn cereals she conjured rotten cabbage. Disgusting! Skye threw it over the cliff and Mousey jumped after it... and that was the end of Mousey.
Meanwhile, a booming voice came from the centre of island saying "WHO DARES CONJURE ON MY ISLAND! ONLY ME, THE MASTER OF THE RAINS CAN CONJURE ON MY ISLAND!"
Skye and Pom-Pom realised this must be who caused the flood and decided to investigate. They trekked into the dark forest of table plants, and the scary skeletal trees told them to go back or face certain death.
Confronted with talking trees, however, Skye decided to engage them in conversation at length and learn what she could about the Master of the Rains. She found out he was very very angry and very very dangerous, living in a castle in the centre of the island.
Pom-Pom had to persuade a now reluctant Skye to continue the adventure and not fly home. Together they journeyed to the centre of the island where there was a scary black castle, and the doors flew open and out stomped a terrifying giant with a beard like a storm-cloud full of lightning.
He chased Skye around his castle, trying to zap her with lightning---a 7-9 was rolled, she took some hefty damage, adding to the wear and tear from the trip but survived---then decided to fight back by conjuring a "Spider In Your Face". This involved a fourth cuddly toy, hurled in my face. Once Skye had retrieved the spider, it was once again hurled and I became concerned about the lack of attack rolls. The Master of the Rains quickly surrendered and Skye demanded that he reverse the spell.
The giant explained that he couldn't; he'd been so angry after an argument with his brother that he'd "stormed out". He could only reverse it if he was happy. At this point Skye used her magic to conjure a second unicorn pencil case (belonging to her older sister), and they did a well co-ordinated disco dance for the giant, aided by Pom-Pom singing. The giant was delighted and reversed his spell and they all lived happily ever after.
That was five years ago but I saved the character sheet.