Our school is preparing some stuff they can do online, also on Facebook a few people have shared some very good lists of online learning resources/activities used by homeschoolers, so we'd definitely do some school work. Anyone who has a "specialist subject" or is good with computers/languages/crafts/skills/experiments can do some teaching of those?
Mine play instruments too so can work on those and maybe do some playing together, also art and craft stuff, jigsaws, games... Might try to set up some Facetime/Whatsapp sessions with their friends too to keep in touch. Walks and bike rides are OK when social distancing as long as you can avoid contact with people, though not if isolating due to someone being ill. We're lucky to have some garden, so they can kick balls around or play swingball or help me with gardening.
Also hoping to do some house sorting with them - it seems like a good chance to finally get on top of their outgrown clothes and toys and give their rooms a proper tidy like we never normally get round to! And no doubt some TV, tablet, gaming, reading...
I've wondered as well whether some of the groups they are in might be able to do some online activities - scouts for example might be able to come up with some creative ideas to link up on skype or something?
Cooking's a good idea too Humina!