How did I cope with boys in the summer? I made an "I'm bored" list for my kids to use.
I posted a list of things to do on the fridge. The lists were labeled "inside", "outside", "for money" and "special request". Any whining, or other expressions of boredom were directed there. The following is about 1/3 of each list from my fridge. I included every activity I could think of, and every toy in the house. It was very effective when the kids were younger.
I hope this helps!