DS aged 10 (only child) is doing really well at the moment, although he would love to get back to school. Things that help are having a routine, and making sure he's dressed by 9am every morning (would live in pajamas if allowed).
We are keeping going through half term doing 3 x45 minute school sessions per day Mon-Fri. His choice, as he recognises he would be bored otherwise. We're doing mainly Oak National Academy online, and some BBC Bitesize. We kept going through Easter too, but have a fairly relaxed schedule, so he's not as tired as he'd usually be by the end of term.
He reads for a couple of hours per day, and has a shared Minecraft realm with his cousins that he plays on whilst FaceTiming them for 2-2.5 hours per day most days. He also watches other TV (likes nature documentaries and Race Across the World on BBC), and we've done some baking and gardening together too.
We have a daily dog walk, and sometimes go out for a run or cycle, sometimes do Joe Wicks PE session, or he goes on DH's Sufferfest indoor cycling thingy.
We've tried FaceTime to chat with friends, but it doesn't work as well without a joint game to focus on like the MineCraft. I know a lot of his friends are communicating through Xbox, but we don't have a gaming console.
Since the restrictions were altered on 13th May, DH has been arranging meet ups where he walks with DS to a friend's house, then takes DS and DS's friend on a dog walk for a couple of hours. He's done this with three friends so far, and is really good at staying >2m apart whilst walking and chatting. It's done him the world of good, as before that he hadn't seen another child in 8 weeks!
We have the odd day where he's whiny and fed up, usually when he hasn't had any proper exercise for a couple of days. He misses school and his team sports, but generally he's doing better than I had expected. Dh and I are both working still (both NHS staff), but have arranged to work opposite days whilst the schools are off.