The solution to this problem is to revolt. Stop taking your kids to the playground. Get them helmets and a kickbike and go to the local skateboard park. Go out hiking with them, even if it's just 300 yards in a park. Run on the beach. Let them eat the sand. Give them proper rain clothing and boots so they can jump in puddles for hours on end. Teach them that there is no bad weather, just bad clothing. Show them how a socket wrench works. Let them "help" whenever you're doing something, if it's cooking or cleaning or repairing stuff or whatever. And for gods sake don't buy them a tablet.

DISCLAIMER: said activities may require physical exercise and actual parenting.