AN: Don't own any of the characters, belongs to Rowling, bla, bla, bla.
So, somewhere on the net I saw someone having misspelled 'Guinness' to 'Ginney's' and thus this idea came to me.
1: When she was nine, Ginny made a bet with Ron over how long she could not talk about Harry Potter. If she managed to go an entire hour, she would get to play with his broom for the rest of the afternoon, if she didn't, he would get her bag of Bertie Bott's every flavour beans. Her tongue slipped after fifty-six minutes and she had to give him the sweets. Still, the loss wasn't too great, she had stolen it from the twins earlier that day.
2: When she was four, Ginny managed to make Percy laugh so hard the rest of the family came running to, thinking he had a seizure of some sort. It was out in the garden, Bill, Charlie and the twins had been playing quidditch while Ron watched and Percy read some boring book. She had peeked over his shoulder where he was sitting on a blanket in the shadow and said something, sending him into a several minutes long fit. When they asked him later what it was, he wasn't able to respond through giggles at the mere thought. For many years it was a mystery in the family.
3: The last New Years Eve of the Millenium Ginny celebrated at her parent's house with the rest of the family and friends. While everyone else enjoyed more than enough to drink, she settled for a glass of champaign and a muggle Polaroid camera. When she showed the pictures it resulted in to her brothers the next day, one by one and of course only the most embarrasing involving themselves, they changed colour several times, George settled for two (from pale hung-over to furiously red to scared greenish) and Percy didn't stop before he reached seven (from nauseated green to flushed pink to almost normal pale, back to green, going on snowy white, then on to bright magenta and closing in on purple before settling on parchment-pale). Years later she had no problem blackmailing them into baby-sitting.
4: When she was six, Ginny decided she would not shed a single tear over something her twin brothers did. Sure, they rarely picked on her, more often they used her as a look-out, still she had observed how they mocked Ron if he got weepy over anything at all. To keep track, she would scratch a small line into her bedpost with a needle every time she broke her own promise. To this day her bedpost is scratch-free... Except that one for Fred.
5: When she was in her third year at Hogwarts, she and her dorm-mates made a rather mean bet about who could keep the longest intelligent conversation with 'that loony Rawenclaw-girl'. She won with thirty-two minutes, exploding first when Luna claimed dragon-keepers were kept alive by their frequent drinking of the creatures' blood, which they were heavy addicted to. Ginny saw this as not only an offence to her brother Charlie, but a personal insult to her intelligence, she could think for herself and didn't buy such a ridiculous story.
6: When Ginny was fourteen, Fred and George dared her to pull a better prank on the Slytherins than they could within ten days. After a week of research and practising she managed to put a jinx on the entrance to the Slytherin common room, causing anyone who tried entering to be hit with a powerful bat-bogey hex. When the twins saw this, hid behind a suit of armour with her, their pride took such a heavy blow they never spoke about it again. Unless they really needed her help, then they could be forced into admitting she had out-done them.
7: Unlike most children, her brothers included, Ginny never wet her bed. No one understood why, but from she was exactly six months old little Ginny would keep her bladder under control until she was safe in her mother's arms. Even if her father or maybe Bill picked her up in the morning she would stubbornly keep her diaper dry to the moment she was embraced in Molly's sweet scent.
8: When her niece Rose brought her new boyfriend home for Christmas at the Burrow, Ginny made no more than three rude comments about Scorpius. This made her nicer, at least more controlled, than even her mother and Fleur, who both thought him to be suspiciously well-behaved, too thin, his hair was too long and his chin weak. They stopped counting for Ron when he reached eighty-seven.
9: Ginny isn't known to be mad for long at a time, but her bedroom-door was the one most frequently slammed in the Weasley-household. Three times it had gone off it's hinges as a result; when all her brothers had left her (Percy, Ron, Fred and George went to Hogwarts, Bill was in Egypt and Charlie bugged off to Romania!), when Harry proclaimed it to be too dangerous for them to be together and the last after the war had ended.
10: Out of all the Weasley-children, Ginny was the one to most often seek comfort next to one of the others during the night. It had nothing to do with being scared of the dark or monsters under the bed, she simply didn't like to sleep all by herself. Therefore she knew all about Bill's muttering, Charlie's snores, Percy's shifting, the twins' sleepwalking and Ron's nightmares, knowledge she would happily give her sisters-in-law as comfort years later.
11: Whenever someone would ask Ginny how many boyfriends she have had, she would always hastily start to talk about something else. That is a record she keeps to herself, the best for her family. Especially Ron.
AN: Useless, cryptic extra-notes:
1: Don't feel bad for the twins, they probably nicked the bag back from Ron.
2: Making Percy laugh is quite an accomplishment if you ask me.
3: What exactly she caught her brothers doing I'll let you decide for yourself. Probably nasty things.
4: No, Ron isn't a cry-baby, that not what I'm implying, but sometimes I think he let the tears run out of pure anger.
5: Yeah, you gotta find something to occupy yourself with.
6: Okay, that's half-assed, but seeing as I don't have Weasley-twins-imagination, that's the prank that outdid them!
7: And when she learned to walk she was as good as potty-trained already. Imagine Molly's relieve.
8: I suspect she either kept a safe distance or got help from some prozac. Or something.
9: Her brothers were supposed to be there for her, not leave her! Never.
10: Okay, I gotta do something more with that idea!
11: But if she ever felt like giving her brother a rage-induced heart-attack...