early in the fifth season, jake proposes to amy. charles cries. amy and jake have a perfect wedding (aside from doug judy showing up out of nowhere and giving a toast). the show gets renewed for a sixth season. 

amy gets pregnant. charles nearly has a heart attack when he’s told. 

jake worries that he’ll be a terrible father because he didn’t exactly have the best role model growing up. and it’s only when they’re lying in bed and his hand is resting on her stomach like always, and suddenly he feels something against his palm, and it’s the baby?? kicking??? and it’s the most precious thing to ever exist and jake decides he’s going to be the best dad ever.

amy gives birth to the cutest, most well-loved little girl in the entire world. jake faints. terry tears up because his work-kids are actually having kids. captain holt chokes up when he’s holding his god-child in his arms. 

amy doesn’t want to actually go on maternity leave because she has things to do, damnit. but when jake stays home with baby ella while she goes in, amy has a panic attack and as it turns out, a captain can grant both maternity and paternity leave (the 99th precinct loses its best two detectives for about a month). 

she won’t admit it, but rosa has a huge soft spot for ella, and one day babysits while jake and amy have to track down a perp (and very quietly, gruffly, claims that this is the most beautiful baby to ever exist).

jake ends up  getting one of those baby carriers so now he wears the baby on his chest at every opportunity. 

OH MY GOD 🙊. YOU SHOULDN’T SKIP THIS WITHOUT WATCHING. YOU WILL NOT REGRET IT. THIS IS A MASTERPIECE 😻💕

‘ ‘Take it,’ he said, and he thrust the sack into George’s hands. ‘What?’ said Fred, looking flabbergasted. ‘Take it,’ Harry repeated firmly. ‘I don’t want it.’ ‘You’re mental,’ said George, trying to push it back at Harry. ‘No, I’m not,’ said Harry. ‘You take it, and get inventing. It’s for the joke-shop.’ ‘He is mental,’ Fred said, in an almost awed voice. … ‘Harry – thanks,’ George muttered, while Fred nodded fervently at his side’

It’s why they agreed to his request Ron get some new dress robes out of it. They’re clever not just funny ‘they always get really good marks’ but as OP says they’re not as good as Percy, Bill or Charlie. They helped Ron get him out of the Dursleys:

‘But you can’t magic me out either –’ ‘We don’t need to,’ said Ron, jerking his head towards the front seats and grinning. ‘You forget who I’ve got with me.’

They get him into Hogsmede , they (unknowingly) helped the trio break into Umbridge’s ministry office. They liked Harry for himself 

‘This is all your fault,’ George said angrily to Wood. ’“Get the Snitch or die trying” – what a stupid thing to tell him!‘’

And cheered him up when things went wrong, such as Harry being accused of being the Heir of Slytherin

‘They went out of their way to march ahead of Harry down the corridors, shouting, ‘Make way for the heir of Slytherin, seriously evil wizard coming through …’ Percy was deeply disapproving of this behaviour. ‘It is not a laughing matter,’ he said coldly. 'Oh, get out of the way, Percy,’ said Fred, 'Harry’s in a hurry.’ 'Yeah, he’s nipping off to the Chamber of Secrets for a cup of tea with his fanged servant,’ said George, chortling ‘

Or when Ron and Hermione were made Prefects and Harry felt left out:

'Yeah,’ said Fred slowly. 'Yeah, you’ve caused too much trouble, mate. Well, at least one of you’s got their priorities right.’ He strode over to Harry and clapped him on the back while giving Ron a scathing look.

They tricked Dudley because they know how crappy Harry’s home is: 

'We didn’t give it to him because he was a Muggle!’ said Fred indignantly. 'No, we gave it to him because he’s a great bullying git,’ said George

And of course:

'Give her hell from us, Peeves.’ And Peeves, who Harry had never seen take an order from a student before, swept his belled hat from his head and sprang to a salute as Fred and George wheeled about to tumultuous applause from the students below and sped out of the open front doors into the glorious sunset. 

Harry frequently heard students saying things like, 'Honestly, some days I just feel like jumping on my broom and leaving this place,’ or else, 'One more lesson like that and I might just do a Weasley.’