While I worked- they worked on a "Summer Fun List", a daily check list we created at the beginning of the summer. It included fun things, learning activities, and chores. I was proud of how responsible and kind to each other they were. The highlight? My older son teaching my younger son to ride his bike!
I also did organizing and minimizing projects with both of the boys. I'm focusing more lately on the minimizing. The less we have the more space we have and the easier it is to keep things neat. It still takes constant work, but I am embracing the minimizing as a lifestyle I choose. That seems to keep the never ending task from getting to me!