Its not supposed to be school holiday at all.
Here in Ireland, the school buildings are shut, but older primary and all secondary students all have either online lessons or at least work being set (and homework to be returned electronically) with most students participating (admittedly, DD did say that a number of her class did geography still in PJs yesterday as they were talking on the class WhatsApp and had not turned on their videos on laptops for a reason!!
. But actual schooling is happening, just not physically in the school building.
The publishers of school books have all released huge amounts of additional resources online - normally given individually to teachers or purchased, but they have made it openly available for the current time.
If the DC are kept busy with their schooling, that means there is a lot shorter day in which they will become "bored senseless". And then getting out in a family group to get some fresh air and exercise is a good thing. Before getting on with normal activities at home - playing with toys, watching tv, board games, crafts, baking, reading, helping with household chores, teaching them about chores/cooking/etc, contacting friends and extended family by skype or phone, write letters to friends to post...…..there are so many things to do!!
Just not with friends.