I think everyone needs it. Parents, teachers, and kids. As a teacher, I needed it to refuel, to plan, and to gen up on new A2 syllabus, and yes, to rest! As a parent, I need it to have a break from going "Come on! Come ON! COME ON!" in the mornings and making everything a rush. In jammies till 10am? Huzzah! As kids, my two, (aged 5 and 6) need it desperately. They're KNACKERED by July. They're whiny and tired and no longer learning. They are timetabled out. They've lost the ability to just "be". Now, after a few days of just sleepy whining, however many days in we are, they spent the morning with a few friends round, and for 4 hours so far this afternoon, they've been playing in the gravel and mud with a hosepipe, making dams. They can do this for hours. Whilst doing that, they've learnt about water properties, physics, amused the dog, and relaxed. They will go to bed filthy and happy, happy to have played for longer in one day than their usual school week schedule allows. I love seeing them blossom over Summer.
Yes, there's fallback, maybe, with reading. They are still reading, and writing ( we keep Summer scrapbooks) but they're mostly just playing, and long may it reign.
My school is considering a 4 week Summer break. As it's high incidence school meals, in a deprived area, and with poor parental literacy, it probably does make sense in terms of fallback for the intake. But I will miss the long Summer.
Being bored is part of it: It takes a certain amount of boringness to get your brain working imaginatively. I recall Summers making complex Sindy mazes and cities out of cardboard and grass cuttings. My two are planning on making a city of junk, our shed is FULL of crap for them. We also have 40 lemons for a lenmonade sale at some point and a dog who is willing to be walked to death. Happy days.