You ask me how to relax, my answer is - nothing can be relaxing as long as you have a child and he goes to the 6th grade. Seriously, every time he comes to me asking for help with his home assignments, I feel stupid. F.e., those Chemistry lessons...he was asked to grow crystals. How the heck can I do this at home? I 've bought a special kit for growing them, something of that kind https://finderiko.com/crystal-growing-kit. Still, the teacher told us we were supposed to do that without any kits... That's why my relaxing is getting a bottle of Bud and enjoying a Sunday baseball match... On Sunday the school is closed, at least.
You've heard of ice crystals. Send him to school with an insulated ice cube.