DS is home educated due to SEN so I'm solely responsible for his education (and social life, which is harder tbh).
I make sure he does some maths and some writing each day. Lately we've had a strong focus on handwriting.
He does some kind of organised activity each day: Art class, philosophy club, history club (which I organise and run), drama club, academic support sessions, ASD meet up.
Other than that he has a very strong interest in history so we watch documentaries, talk about history, visit museums I read aloud to him from popular history books. I buy him kids books about history. I run that bloody history club. I will be spending my Sunday shopping for tissue paper to make viking wedding crowns.
There was a thread on here once about home Ed and someone said "Lots of parents do that stuff anyway at evenings and weekends". This is absolutely true. He can't handle a full school day so it's like he's only doing the "extras" that another kid might manage on top of a day at school.
DD goes to school. Its Gaelic medium education and they don't do reading and writing in English yet. I make her read an English Reading book to me each morning. Then her Gaelic reading book at night. I'm not good at getting the homework done otherwise (Bad Mum!)
She does after school clubs: MMA, drama club, Brownies. In particular, I send her to academic support sessions with Into University, which is fantastic if you meet the criteria (It's aimed at families on a low income). It's really helping with the English side of things. It's also good for getting a broader education as they cover a different "University subject" each term, adapted for primary level. She's done Chemistry, ancient civilisations and Astronomy so far.
DD likes art so I make sure she has art and craft supplies, buy her how-to-draw books and books on different artists.
Tbh: It's not the specific things that are important though. It's more the sharing of an interest. Take an interest in what they're into. Share your interests with them. That's the stuff that will stick.