A great way to spend this time is learning and practising your multiplication tables.
Children are used to Rockstars and use it daily in school. It is best when it is used as quick blasts. Perhaps, 15 minutes a day?
If you're not shattered after your Joe Wicks workout... supermovers is a great way to learn your tables and look a fool dancing around your house! (Parents will love it too - I'm sure!)
Can you defend the Kingdom of Mathematica using your knowledge?
Lots of children's favourites are on this site!
Maths Games: http://www.maths-games.org/
Here on some useful resources that might support your child with their home learning. I'll try and update so keep checking back!