We've been to a maize maze, day trip on the train, he's had his friends over a couple of times and been to his friends. We've had a couple of chill days with movies, we went out for lunch and a mooch about in a market town. We've been to a farm place with sunflower fields, an aquarium.
He'd be quite happy left to his own devices (literally!)
We still have a few plans, but we are going away and I do have work for the next couple of weeks, so it'll all calm down.
On the list still to do is...
Uniform shopping (sweetened with a new pair of fun trainers for the hols)
Swimming
Baking a big cake
Laser tag.
Normally we'd build in a couple of bigger trips, but that's because we don't usually go away in the summer hols, so here are some of the things that we've done previously, to see if it inspires you!
Trip to London (tourist stuff, or Camden, or a museum)
Trip to the coast
Stonehenge/a castle/something along those lines
Somewhere beautiful, with a picnic and hopefully a river to paddle in/build a dam/catch sticklebacks and a long chilled English country side summer day vibe.
Into the local city
We're also a fan of finding the unusual stuff, like a pinball cafe, or curling, or something else a bit unusual.
Hope this helps!