I have one 10 year old son. I am very fortunate that I am getting teacher so have the full 6 weeks off with him. I am lucky that he is very chilled.
We have just finished school today.
We are away the middle two weeks so that will be lovely.
Other than that, a mixture of:
Swimming
Local walks (we have lovely bridal paths and moorland near us)
Seeing friends/family
Local library
Things at home such as lego/cooking etc.
He has a voucher he was bought for some sessions at the local clip and climb so will spread those out through summer.
Trip on the train to the next town along.
Free museum in the next village.
Will also look out for other free/cheap events locally.
We have great outside space so he will play outside a lot too.
Basically, we will do lots of nice things but also enjoy the slower pace as term time is crazy busy both because of my job and then his extra activities/homework etc.
I need to do some deep cleaning at home too!
The holiday abroad is costing quite a bit hence free/cheap stuff the rest of the time.
As I said, he is very chilled and to be honest, he is looking forward to some down time.
As a teacher, I know how much we pack in to every day and week with the kids and they really are tired at the end of the year so I wouldn't be afraid to have a few days just chilling.